Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce466c94e0f7c500…

MALICIOUS

PDF

71.6 KB Created: 2021-03-06 09:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8c923517e474e21fed88485e7b773dc3 SHA-1: 7156d9ac4ea2db39c5f7e565e66b4927d8e02668 SHA-256: ce466c94e0f7c5006852f576a518b9a2a1deef0083f3935332e08216050ab6c4
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent external URI pointing to 'gimoguvi.ru/strik', suggesting a phishing or redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document's primary purpose is to host a large number of links, likely to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=what+is+twg+services+limited PDF link annotation
    • http://naxovonukile.iblogger.org/7619594612.pdfIn PDF document text
    • http://nubebukexowi.66ghz.com/opencv_c_tutorial_for_beginners.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/google_earth_map_for_pc.pdfIn PDF document text
    • http://vanebitedituki.22web.org/bidalexivoroxitedezur.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/lomuper/st_paul_brass_band_music.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_d1ba6914e4f540f79525d73ea572ae29.pdf?index=trueIn PDF document text
    • http://sopimofa.rf.gd/34025883606.pdfIn PDF document text
    • http://kodurubakasifi.epizy.com/call_of_duty_free_for_macbook.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/poe_beastcrafting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/25138672877.pdfIn PDF document text
    • http://ratezomi.epizy.com/32074009502.pdfIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_98c76760d83946d4a77837bc11d59490.pdf?index=trueIn PDF document text
    • http://wizuwevamonet.rf.gd/what_to_eat_for_breakfast_to_flatten_stomach.pdfIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_208156c79a044981a56731a4576541ce.pdf?index=trueIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_a6218c947d2c478eb57ec233fbace2d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/17195889392.pdfIn PDF document text
    • http://wenumamugaru.epizy.com/the_taming_of_the_shrew_act_5_scene_2_analysis.pdfIn PDF document text
    • http://gamukudolaxe.epizy.com/apa_format_bibliography_ppt.pdfIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_657d33d7cf2641f9a4bd4a24f57c9341.pdf?index=trueIn PDF document text
    • http://xidozakeza.rf.gd/35311270955.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_f08b0379be534b0996198be1737a1394.pdf?index=trueIn PDF document text
    • http://mitegoma.rf.gd/marlin_336_big_loop_lever_install.pdfIn PDF document text
    • http://nokatebikexu.epizy.com/whirlpool_cabrio_washer_reviews_2020.pdfIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_af960f4e93d040488b53f77fa6a97ad9.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_cf0d36dd332646959ffab51910db3ceb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/wofazopitejudejadil.pdfIn PDF document text
    • http://juvugakor.rf.gd/jilalekota.pdfIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_2d623cf79bf6470f86f78cd03d66daa5.pdf?index=trueIn 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_off0000dbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBA 5516 bytes
SHA-256: 62a1b69ababbd8d1fc7b175423a854e039504496d72d2fd2650f17fa38768eae
font_01_sfnt_off0000ee6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6D 9848 bytes
SHA-256: 3b8f11bbef54faf8c8ebc354956f9827ea9880f380f2ca1af6b2e364be109fbe

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