Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86d06ab9f0202e7…

MALICIOUS

PDF

93.8 KB Created: 2021-03-18 21:16:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ace89c1d842fb7994bd778b8b09ac43 SHA-1: d46e39196cfad6d38750c0d60892fe55549e04d2 SHA-256: e86d06ab9f0202e75cd803b76e8d015bfce333b82729fa09f9b19958f7953151
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a large number of external links, many pointing to disposable hosting services, suggesting it functions as a link farm designed to distribute malicious content or phish for information. The document body, though heavily obfuscated, appears to be a lure related to MLA formatting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/strik?utm_term=how+to+write+a+book+title+in+mla+format+in+text
    • https://narusipanunajix.weebly.com/uploads/1/3/1/0/131069819/6698702.pdf
    • http://zatodawu.iblogger.org/how_do_you_make_a_really_cool_house_in_minecraft.pdf
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/76553b.pdf
    • https://mixojokujize.weebly.com/uploads/1/3/4/3/134387696/b14e8fad1ac37d.pdf
    • https://padamiraniz.weebly.com/uploads/1/3/5/3/135305831/8976917.pdf
    • https://tawatoxox.weebly.com/uploads/1/3/4/0/134018263/poses-nosurogibixer-wijup.pdf
    • https://judexibegajojid.weebly.com/uploads/1/3/4/8/134885636/6180c7d24e650a7.pdf
    • http://shoop-fn.ru/palixakopaxegzqep.pdf
    • https://sopebanodi.weebly.com/uploads/1/3/4/0/134017095/3872561.pdf
    • https://mokomowu.weebly.com/uploads/1/3/5/9/135969792/botum.pdf
    • https://janafapaxe.weebly.com/uploads/1/3/1/6/131606835/lujadorijavamoz.pdf
    • http://wimoxoj.22web.org/tian_dayton_emotional_sobriety.pdf
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/5245705.pdf
    • https://mavulirapiba.weebly.com/uploads/1/3/4/7/134741644/libumaxavikelurox.pdf
    • https://xunilizavokuniz.weebly.com/uploads/1/3/6/0/136050149/a46bd858a76e1a.pdf
    • https://tuxakosubulep.weebly.com/uploads/1/3/4/0/134012578/xolanibojexa.pdf
    • http://repair-planshetov.ru/how_many_calories_are_in_a_bojangles_cajun_filet_biscuited3et.pdf
    • http://registrat.space/cynosure_apogee_elite_manualtkmvf.pdf
    • https://neruwutuwi.weebly.com/uploads/1/3/5/9/135960217/6048486.pdf
    • https://xijegubusogo.weebly.com/uploads/1/3/0/7/130739006/8365523.pdf
    • https://rifojiditesi.weebly.com/uploads/1/3/1/3/131379396/7673869.pdf
    • http://ledojekukifal.iblogger.org/monthly_expense_worksheet_printable.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rilulavonepuv.epizy.com/27004395706.pdf
    • http://zijozuf.epizy.com/que_es_derecho_civil_persona.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cde.bin
6a8d6de5e8fd386a2c66079597134f17df8e4c869d168b57e0298bef7a6ef5a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDE 5060 bytes
font_01_sfnt_off00012e17.bin
d0796f967c67e4f91e627075c9f105aeea22d8f688520fa3f71c3c357371c66b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E17 11252 bytes
font_02_sfnt_off00015481.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x15481 16036 bytes