Malicious PDF — malware analysis report

Static analysis result for SHA-256 0604083987c5615c…

MALICIOUS

PDF

136.1 KB Created: 2021-06-26 14:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7eb661f7c19b3974134ef7a52f82145e SHA-1: 4355c6c40976bafedb1862ec9e615f307fdf9d38 SHA-256: 0604083987c5615c2219fef09025c05798a63366eae3db68c7b1cca3f5376d4f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, and the embedded links are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094207bd61e4---pezuxupo.pdf In PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df08210caa---76517672882.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/14ca25bf82c9d92ef72c3532822f0ce2/19113317620.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/150a5e31ecfdfdf4ffb67b132b9f7d92/2714916609.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/err2l4p8chf39ai3smdjpjh4a3/63749233581.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/fojomesof.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd8f9b736e---zumaxazaxawidemo.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/9b6ff8bfde2dc7ea178e151cb7347f13/rigekex.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6add8bd11c222183dda28a4bd25b134d/gonorevodaxapewexipom.pdfIn PDF document text
    • https://artbynela.com/uploads/file/29707404152.pdfIn PDF document text
    • http://ambulatorioveterinariocigliano.com/userfiles/files/32809842907.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b74bb4e413c---70569288189.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/4064df69ab6b4338f0a462c9b85519a1/pibexadawamutemodok.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b3cb90b60---siwebidunulubepevokigo.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/ripokanawoxut.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ff5c5839f---53388839585.pdfIn PDF document text
    • https://hirurgija.me//files/15153753825.pdfIn PDF document text
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/lekatikaku.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/timupiveju.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/8bb91dc1f19853014763e6d4e83f2b8e/mewim.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/us52l9a2ld1kkkjvfp9dkr1nnd/26938620777.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f18d73b71---medokuge.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160823326f3cf0---kitujezizixo.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c770b76438b---24140054601.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=confidence+shattered+meaningPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000195b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x195B8 18164 bytes
SHA-256: 16b824f9442eadd5e7a848aa031deade39507e83b11e843c89e4b96ef3825258
font_01_sfnt_off0001b23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B23D 18192 bytes
SHA-256: afbf1e99eccf7df67484330410930c607594faed0c579c205c8d56365ec2238a
font_02_sfnt_off0001e158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E158 10908 bytes
SHA-256: 3de96b27fe361ec1c6efd5c278bd0b07b670f6450d764ac71a25caedc2a353aa
font_03_sfnt_off0001fa41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.