Malicious PDF — malware analysis report

Static analysis result for SHA-256 43eb0ea43933182b…

MALICIOUS

PDF

79.6 KB Created: 2021-03-31 04:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7e1153777c8c3344292d26426b6dae5f SHA-1: e7e1402ec7362755257021d41aac757b6262a61e SHA-256: 43eb0ea43933182b6c00e1389b829aeb2a7749cb26c3395ce0e3ca0e825c017f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://bologen.ru/123?utm_term=student+id+card+template+cdr PDF link annotation
    • http://resufomuvojos.22web.org/vizezu.pdfIn PDF document text
    • http://nitafefuxomod.22web.org/53700545961.pdfIn PDF document text
    • http://samettemiz.xyz/puwepapopebawejasakowu5f1f1.pdfIn PDF document text
    • https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/zuvuwadenevazuzu.pdfIn PDF document text
    • http://zipibafof.iblogger.org/4375612137.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/35951988786.pdfIn PDF document text
    • https://romagazep.weebly.com/uploads/1/3/4/7/134759296/74ee8.pdfIn PDF document text
    • http://xokapik.mywebcommunity.org/69997646494.pdfIn PDF document text
    • http://gevenukodujojov.getenjoyment.net/fidonijiwebaravujefudot.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/28884942542.pdfIn PDF document text
    • http://sexesex.site/tissot_touch_2_experty37sh.pdfIn PDF document text
    • http://zumufufup.sportsontheweb.net/fijurorufowudexup.pdfIn PDF document text
    • https://wejanorop.weebly.com/uploads/1/3/2/3/132303338/6165842.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/laxajurewir.pdfIn PDF document text
    • http://zibikudupe.mywebcommunity.org/buzegoxedawuvuwiginuwewo.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/bosch_pbh_2100_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vebagakid.onlinewebshop.net/couples_therapy_exercises_worksheets.pdfIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_47075bcd92ac4103bf2aaf77fe7eb0d8.pdf?index=trueIn PDF document text
    • http://kixilobulutipe.epizy.com/tuxugekunufubalitopomoxet.pdfIn PDF document text
    • http://sanikivatuma.rf.gd/4727669290.pdfIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_b08285704af44d6bbe230007a25e400b.pdf?index=trueIn PDF document text
    • https://5ec50ee2-6c76-415b-b731-82d7de26534b.filesusr.com/ugd/826e74_e39f30ad938f42ef9f40be3eb9a2273c.pdf?index=trueIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_edb80648b2994f6d95f75c72e59c527d.pdf?index=trueIn PDF document text
    • https://bb0106b8-f3e0-414b-a873-a0e24df3f2ad.filesusr.com/ugd/b84a33_5767cb951a85473697b98d6134dcd34b.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_off0000f8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F4 5144 bytes
SHA-256: 0d947a6f4d680da32bc71fa6f42dcf126d3eca03cfdb7649d58d226e3adf52d2
font_01_sfnt_off00010a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5B 11196 bytes
SHA-256: cbc0c86955d2e3dae30a80cc490d08af6e27a6ec1683a888a53507e041e5b20f

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