Malicious PDF — malware analysis report

Static analysis result for SHA-256 c91eeeb7c10b66d3…

MALICIOUS

PDF

73.2 KB Created: 2021-03-08 10:29:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 38ce0b10c4af94ac9f20a8839edd9ffb SHA-1: c23553a298f4f6366227ea3985ce5529e9ac9166 SHA-256: c91eeeb7c10b66d31b545c28f92a8adf812be330ae8d13e5c80cb9138d03cb92
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic firing for a 'PDF_SEO_LINK_FARM' indicating a large number of links, many of which are likely malicious. The ClamAV detection and ML classifier also strongly suggest malicious intent, specifically phishing. The embedded URL 'https://midufefew.ru/wix?keyword=black+max+6560+generator+manual' appears to be a lure, disguised as a manual, to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://midufefew.ru/wix?keyword=black+max+6560+generator+manual PDF link annotation
    • http://glav.info/bibopanilusibuxarafofuxv2ss.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/runijuw.pdfIn PDF document text
    • http://p-kavkaza.ru/marksmanship_pvp_guide_bfavuqfi.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/pitaluvapadelokasenr2kav.pdfIn PDF document text
    • https://fuxusololozo.weebly.com/uploads/1/3/1/3/131380606/b620d470.pdfIn PDF document text
    • https://kovofogigexu.weebly.com/uploads/1/3/1/8/131856149/bawamu-pozebojovobep-xulezenep-waginobew.pdfIn PDF document text
    • http://raifaisentapp.online/glitch_wallpaper_hdle33y.pdfIn PDF document text
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/9060603.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/rexiragegirulug.pdfIn PDF document text
    • https://8a3b53b1-4b9a-43fa-8d11-acca05b1aa90.filesusr.com/ugd/7ad284_c880afd484984a41ba6400c9d6064f90.pdf?index=trueIn PDF document text
    • https://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_88259fa6d672475ca262c71c508465f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/ponipegorupol.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/40838795692.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/vapapamafuwuzo.pdfIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_3bc2ba65e204486eab1e9346fc3d3481.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/what_does_the_bible_say_about_the_lambs_book_of_life.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/application_security_policy.pdfIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_a68bac44ef6e4f5cbac4aedfb2c03344.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wixanarer/jurnal_pingsan.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/my_hp_officejet_pro_8600_wont_scan_to_computer.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDE 5540 bytes
SHA-256: 5b62d6270c24f50bf2b7ffe4c7e779e352a2fd6840902ac1ffc47cb087900539
font_01_sfnt_off0000f2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B4 10800 bytes
SHA-256: 4ff3ed7412428a9dc224d216ce60d8ee4810ebaf705a0815d70d45a3e7843615

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