Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74c95bb2c060bd7…

MALICIOUS

PDF

72.3 KB Created: 2021-08-28 10:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d2a8321f62953f127d5dfe4268fd716a SHA-1: f47c2042a7f980bd185faec21d99eb822bcea868 SHA-256: b74c95bb2c060bd74da43820cb225aceaf52cefa58dd66815d0af8c0d406c746
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the link farm pattern is a common lure for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://veewood.com/file_media/file_image/file/gibanagur.pdf In PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608718a0e89f1---sovenet.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16073e6a91b48e---68799246119.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/b01f6db956178fec1bc845ac6970d24b/66215356317.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/0c370c0d69f9b61846e605d6fa6d66ce/zuliwo.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/143daa58c3a626ddfb3ca38162840a5e/19354757174.pdfIn PDF document text
    • http://ambulatorioveterinariopisillibertozzi.eu/userfiles/files/82997528581.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/nafatabevisivogojanozog.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/8d925c6073a2f2c016fa69a4ebc32e68/gusigedinujolasixupoge.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/5b3400cbd6d7f58e480e3d88c0efd081/dejemad.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/862904ef66db8eaaddd3b13da0c8b190/67409132199.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/13081746783.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/b4fb1b2680cf185e3fe76e36b2465f08/63876595768.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/rqeg0uvgtrq4143rmn3ndkroc5/senukamo.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8c1a69067---tomawugimegeloxafu.pdfIn PDF document text
    • https://aduanaldelvalle.mx/userfiles/file/zawemovavatomop.pdfIn PDF document text
    • http://lg-palette.com/upload/files/57153752366.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/73f3cadc3f808eceb685debb92e9e3fb/zopimaxuwezobolanuvelata.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/79657201742.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/65397b66d801eaaa380d2067c0865947/kotizuvur.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/wusarolisibapalanexikazi.pdfIn PDF document text
    • http://zerosquareonline.com/file/gixefefasakugeziluv.pdfIn PDF document text
    • http://www.empresshasnoclothes.com/siteuploads/editorimg/file/gibutugogisen.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f2112d50e2---xigujedidabuwetaned.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/9181c03f726fe272d03f55aee8fd0e9d/41301366330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+get+free+money+on+csr2PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40C 10692 bytes
SHA-256: 8523f95afa72d042e2c0dd43d7d46fcc56a7e82251fec36884671c54f23eaf52
font_02_sfnt_off0000ecac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 15308 bytes
SHA-256: 02ddf27a41506050a988f4a7409ee3285a1e941a81a14352752a2789c3890c02

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