Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b604f388276848…

MALICIOUS

PDF

77.4 KB Created: 2021-03-11 06:26:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 182dfb937d5f7d5dbc918f33393a5c96 SHA-1: 83c570d959a2faaeaa2c8df75fee55ffe3fd9159 SHA-256: b6b604f388276848163b049e4d367c107a22fa2e2ac25d951e33bb97f8dfd84b
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by heuristics as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Ikea malm bed with storage instructions', indicating a lure. The presence of external URIs and the ML classifier's high confidence score support the assessment of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/strik?utm_term=ikea+malm+bed+with+storage+instructions PDF link annotation
    • http://dabedera.mygamesonline.org/asfixia_neonatal_2020.pdfIn PDF document text
    • http://xunopapazugatar.medianewsonline.com/raxudatapiwudusiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407795/normal_602e10341e980.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/pajovorafopomij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423133/normal_5ff0bde540529.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378856/normal_5ff9115e45c5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409405/normal_60490140bee15.pdfIn PDF document text
    • http://fakaluwu.scienceontheweb.net/53668618724.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491945/normal_5fd2795d60347.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/edward_said_crisis_in_orientalism.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_6031f663853f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501045/normal_5fffcbc31001a.pdfIn PDF document text
    • http://lenulari.mypressonline.com/bupobikuwaradate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_5c9ea2b340c247a3b129f0d09fac18c4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dc1909e-af9c-4510-a0a4-e53bb0b129c1/lirepuwaluru.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/13423904094.pdfIn PDF document text
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_4dc4daee423e433694c360a18e4c7f45.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e63ed5e6-924d-460a-9597-6e2009fc8767/contemporary_management_theory_slideshare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d364999-8309-4316-8911-4ae82b90acd4/direkakedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59cbcf93-d22e-4490-98a9-69febdcf0009/super_jack_jump_world_adventure_runner.pdfIn PDF document text
    • http://gubadif.myartsonline.com/jorutaselavuvaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86a57dcf-bb9a-4027-891d-1b7f8a1caa84/jack_nicklaus_quotes_about_tiger_woods.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/princess_bride_movie_free_online_full.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 5588 bytes
SHA-256: 3fa8397dc65e3bb621337535b8d61f539e8264ded55dddfdfeb427ce521fa046
font_01_sfnt_off0000faab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAB 1936 bytes
SHA-256: 21a7146106e2ad29a4dcc6aa55cee169416400570e2b3d493b6d071cb256f2f3
font_02_sfnt_off000103ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103ED 10352 bytes
SHA-256: 235f3024d1b109f9b481951c7c0b3be2154fde44f400186c9e45f6bbfb8c787d