Malicious PDF — malware analysis report

Static analysis result for SHA-256 422abea60638484c…

MALICIOUS

PDF

125.2 KB Created: 2021-03-31 09:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6e1ac764ea7d20d615d8d5deb7730d26 SHA-1: 8e8638aefb8a6974e7ef638859cf9508e26b0018 SHA-256: 422abea60638484c114b1933357d26d0b11a58bf7abbcc1d982f36decf6f051d
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable or suspicious domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains text that appears to be a lure for a "Boomkin leveling guide", aiming to trick users into clicking on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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://golowaki.ru/123?utm_term=boomkin+leveling+guide PDF link annotation
    • http://widaget.22web.org/edelgard_tea_party_answers.pdfIn PDF document text
    • http://wajofima.mywebcommunity.org/pajido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416316/normal_60385d8c64f35.pdfIn PDF document text
    • http://fortuneo.biz/maya_animation_application5u4fs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502870/normal_6035dd62ef4b7.pdfIn PDF document text
    • http://mnclassis.org/rizotido7ie28.pdfIn PDF document text
    • http://bizbize-yeteriz.org/how_to_use_a_1_8_scale_rulervmjce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476564/normal_6025cfd7d424f.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/8509957493.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_6004be42a6122.pdfIn PDF document text
    • http://100naturals.fun/23281241056ymna0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lagawutek.epizy.com/41378127381.pdfIn PDF document text
    • http://lobuxujan.epizy.com/76828132658.pdfIn PDF document text
    • http://tameladizikep.atwebpages.com/kovamefawiboxujizopedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e021ff9-e397-4be8-af54-6a1c11f155e2/satusidubatizurubipina.pdfIn PDF document text
    • https://6acbaf94-bc62-4fdb-9a00-914544f0b606.filesusr.com/ugd/3ee118_8de17fac8a3a4f7499abceb87f9740c0.pdf?index=trueIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_fabda1d9fd804ca3a14aa0e8bf9c9035.pdf?index=trueIn PDF document text
    • http://boraxatisota.rf.gd/36945114143.pdfIn PDF document text
    • http://magivuxitafexox.rf.gd/what_is_the_training_for_a_navy_seal.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_ad10f987d6874dc3975033f86f51a811.pdf?index=trueIn PDF document text
    • https://ae9cd3fc-a2ed-4114-aa96-dd53a7e96ab4.filesusr.com/ugd/22cbe6_0a494078b3fc4c719c4220783cac6bed.pdf?index=trueIn PDF document text
    • https://9480ebe7-8096-4165-94d5-b35dd525e9f4.filesusr.com/ugd/07b43d_8943f390007749a5ba05dfa6526ca079.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb428ed-d7b8-4976-b3b9-483f0f95a43c/fezudozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/588a2bff-d21f-413c-b8de-b3665fd344c2/aqua_logic_controller.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001925a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1925A 4836 bytes
SHA-256: dbd4af23b306ad72394135bd161cbf26b183a855e25634f929df22a4887ee90b
font_01_sfnt_off0001a2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2CE 11520 bytes
SHA-256: cb84f850821535ba3444ece6e3b7fbe9b481161f789eaea6c31ed795dd19526a
font_02_sfnt_off0001ca30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA30 17944 bytes
SHA-256: cbccfad1c1f135414217b7ba667850a59b7a68c668a010f84fff8c93d14c0e49