Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbf4809b191843b…

MALICIOUS

PDF

50.6 KB Created: 2020-06-14 17:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 120e016890f586e84438d0c748a08f09 SHA-1: 95f62e5133b3542dbd6bfaaaa8cf985c1e28b550 SHA-256: cdbf4809b191843b7b8d20090bd10cd7b4968393e89e6765542bf3c72a6d6e3a
104 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external PDF links, a common technique for SEO poisoning and distributing malicious content. The document body, though heavily obfuscated, appears to reference 'Goodyear aviation tires manual', suggesting a lure to disguise the malicious intent. The presence of multiple external links, including one to 'vantagetactical.net', indicates a likely attempt to redirect the user to a site hosting a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vantagetactical.net/uploads/1/3/0/7/130775214/130775214.html#goodyear+aviation+tires+manual PDF link annotation
    • http://3jk.undesirable.us/uploads/1/3/1/3/131398088/5268002.pdfIn PDF document text
    • http://reviewsonilipo.com/uploads/1/3/1/3/131398258/penowepun.pdfIn PDF document text
    • http://expert24.pl/uploads/1/3/0/2/130270799/6c054.pdfIn PDF document text
    • http://auntiematter.com/uploads/1/3/1/3/131380305/sadumigiki-virin.pdfIn PDF document text
    • http://juvenileaidsierraleone.com/uploads/1/3/1/8/131871787/442081.pdfIn PDF document text
    • http://b-b-s.rs/uploads/1/3/0/5/130589171/d01e45c0ee10ff.pdfIn PDF document text
    • http://pinuccia.shop/uploads/1/3/0/7/130775879/2c366.pdfIn PDF document text
    • http://sharonscouts.org/uploads/1/3/0/5/130538870/vawat-januzuxenigido-ditupeniwi.pdfIn PDF document text
    • http://nikkiboklund.com/uploads/1/3/0/6/130639956/jogegaden.pdfIn PDF document text
    • http://ivorytowerblogger.com/uploads/1/3/1/6/131606411/fuvoxotenapukedisaxe.pdfIn PDF document text
    • http://mail.speluqueros.com/uploads/1/3/0/5/130550910/87509f0f841.pdfIn PDF document text
    • http://hostmaster.ithacavilla.com/uploads/1/3/1/4/131438128/roxedoduvasupexin.pdfIn PDF document text
    • http://oddhieshop.com/uploads/1/3/0/9/130969814/37de94601.pdfIn PDF document text
    • http://affordablehealthcarequotes.org/uploads/1/3/0/6/130620375/lifivaxedo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sujerejuziv.files.wordpress.com/2020/06/90736384193.pdfIn PDF document text
    • https://magavipufu.files.wordpress.com/2020/06/zigezagiwer.pdfIn PDF document text
    • https://xojitakav.files.wordpress.com/2020/06/86364075327.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8592 10492 bytes
SHA-256: 25d786265e8a76fe278372396d9de3981b65a24dd38cb5c2fd0fd3442ebaf7aa
font_01_sfnt_off0000a98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA98D 16072 bytes
SHA-256: c7fc2d1081ce2d1179ed2afaf5a23d9e8d82a48aaeac8228758ce014c49ce151

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