Malicious PDF — malware analysis report

Static analysis result for SHA-256 5990b5cbaf4768ed…

MALICIOUS

PDF

70.8 KB Created: 2021-02-16 11:59:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fc92f0414284f2d6270ed9e0b5676dc9 SHA-1: 4938335bddcbdab3fc7701128f889f223a1a9958 SHA-256: 5990b5cbaf4768ed7486cb43dac74815c2d94c66fe06fa633f370ae8b2807317
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external URLs, suggesting an attempt to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a malicious intent to lead users astray.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=unlocked+karen+kingsbury+pdf PDF link annotation
    • https://cdn.sqhk.co/fujotojaxob/hghEygj/my_little_pony_harmony_quest_game_online_play.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/uGTheic/ivan_the_terrible_holocaust.pdfIn PDF document text
    • https://cdn.sqhk.co/mojafefegamo/1hejgif/53016966262.pdfIn PDF document text
    • https://cdn.sqhk.co/fifenije/fRgdgeG/tegaminoxerivo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454435/normal_5fe0bac29418b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393020/normal_5ff86dc8cf371.pdfIn PDF document text
    • https://cdn.sqhk.co/nepusoliweda/SmFihiP/rummikub_junior_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/wanoposuj/ohgChcf/wovupipijupaxizadamowoje.pdfIn PDF document text
    • https://cdn.sqhk.co/vefasebo/gemiix2/48233828473.pdfIn PDF document text
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/35147398ee.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/REifcgi/tojedemu.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/ifBjiig/metaphysics_name_meaning_in_urdu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459776/normal_5ffeb227644f5.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/hhcE65F/dinos_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zovigobut/116qJkm/arcade_archives_crazy_climber_2.pdfIn PDF document text
    • https://cdn.sqhk.co/nanubebebot/ighea4U/dc_comics_animated_movies_coming_soon.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/bicghgd/70372482618.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD620 5620 bytes
SHA-256: f7f35f5f9b94ca98749708fc80993d601f3dc5e3b2c25a8bef88705891ecd038
font_01_sfnt_off0000e950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE950 10412 bytes
SHA-256: 3279de0391cb97806b8d64507c4b329bc29d04a63f7f04c33a92074036504fe5

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