Malicious PDF — malware analysis report

Static analysis result for SHA-256 338ec8002e73637c…

MALICIOUS

PDF

78.4 KB Created: 2021-09-02 09:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c2e331da0f9c766cd851908fa417c8c3 SHA-1: 471bb93ef9ed93ff90e7e81a34c800eb9c3b38bc SHA-256: 338ec8002e73637c64bdec0527e1e6f061d413828f0a99caf7d8c6911bfef063
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to websites hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, but the link farm structure is a common tactic for redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • 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 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 https://alarrabnews.com/images/content/content/file/guwewatokubiwi.pdf In PDF document text
    • https://baxsporthorses.com/userfiles/file/64980921874.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e26ec7d37---57151714980.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/paxakomijitepana.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/51ee95e1dc4bb5df642c6e10e20ffa50/99002326153.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/kepevamowirepurizajubagak.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/161217ef6ce211---pirejevibijazaxobegirir.pdfIn PDF document text
    • http://xycrusher.com/d/files/40138394024.pdfIn PDF document text
    • https://howaidalawyer.net/userfiles/file/fuvubafebuv.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160e986567de9e---55178402667.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/70875437119.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/20856473636.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/fca181df855d899e4152e1a42b0fc6ea/91264552545.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0d5a11f26---takezudajepulaj.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/rifed.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/rimak.pdfIn PDF document text
    • https://energooptima.hu/upload/File/28160299994.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608918d8ac8ad---dilojoxem.pdfIn PDF document text
    • http://valaptop.com/ImagesVA/file/38083977163.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/92060545924.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/6116693223.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/21741872509.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/72b6a8606f64974db24f5a875bf21315/89830352570.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d393632ee99---70601784957.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160de6a1b7e095---45300695092.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=midpoint+of+two+numbersPDF 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_off0000ccd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD3 10768 bytes
SHA-256: 30180636571fac547bc2b5546c1b6ca43c55a5bed75635fd28e345ce19745799
font_01_sfnt_off0000e567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE567 17880 bytes
SHA-256: 17dc7e7e2c66a2db06bae6751484583662c257de9fee05d8c062918e6db35eac
font_02_sfnt_off000113a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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