Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a03b65f96382c21…

MALICIOUS

PDF

76.4 KB Created: 2021-03-16 12:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51030b02d808f81b3b93ea94776f5db5 SHA-1: 937f2394dc5836b2ef6f33aa34e3005840b72dcd SHA-256: 3a03b65f96382c2175cd815c1b9c04fb72cff871bce583b106efaa5d7ead12b9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are SEO-themed and point to other PDF documents, suggesting a link farm or content manipulation tactic. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Tomb of sargeras raid entrance' and the authoring application, which are likely lures to direct users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wix?keyword=tomb+of+sargeras+raid+entrance
    • https://cdn-cms.f-static.net/uploads/4487413/normal_604f0278ea6f9.pdf
    • https://famuvotatag.weebly.com/uploads/1/3/0/8/130813835/molimafoves.pdf
    • https://cdn-cms.f-static.net/uploads/4407994/normal_6046f56d54eba.pdf
    • https://cdn-cms.f-static.net/uploads/4459939/normal_60273dafe134b.pdf
    • https://cdn-cms.f-static.net/uploads/4496404/normal_60198aa47e2b2.pdf
    • http://tanivikovome.sportsontheweb.net/wemadigetijawediku.pdf
    • http://tihefers.online/30890806342zkbgj.pdf
    • https://gabodubelekopo.weebly.com/uploads/1/3/4/3/134356924/sokejebabasemosujot.pdf
    • http://on-arenas.com/678468352509sbw4.pdf
    • http://midikakuvekume.mywebcommunity.org/make_every_man_want_you_marie_forleo.pdf
    • http://getdouche.xyz/free_printable_coordinate_graphing_pictures_worksheets_batmanfwii1.pdf
    • http://gisoboxizaza.mygamesonline.org/qu_ao_se_puede_legalizar_un_carro_para_mxico_2020.pdf
    • http://santaparker.store/23743185557ywpvb.pdf
    • https://jenifamizoj.weebly.com/uploads/1/3/5/3/135319667/3832322.pdf
    • http://jesofafisozosa.iblogger.org/86242708747.pdf
    • http://tasunixupowife.66ghz.com/cambridge_pet_speaking_exam_samples.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xexosekijifakam.epizy.com/what_is_the_21_day_sugar_detox.pdf
    • http://maretubozewugi.myartsonline.com/mamoxiz.pdf
    • http://getojigukas.epizy.com/acceptance_letter_format_for_college.pdf
    • http://kegoxakalebow.rf.gd/95327352756.pdf
    • http://nejarisiwudu.atwebpages.com/19216947849.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd5c.bin
4684bffea9cc001d07a06d0e139bf38ff57f87d0d3c8f942058bb4e6afeee8a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5C 5184 bytes
font_01_sfnt_off0000eee5.bin
85261748a8020b4cfbdc11436c3f7b2f154274f7131addd9d2ebb44b194f0d6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE5 11456 bytes
font_02_sfnt_off000115d6.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115D6 4324 bytes

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