Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2cb7f4a0336691…

MALICIOUS

PDF

82.4 KB Created: 2021-03-17 19:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ff084f8bd7d3f809498b82b8259f23d1 SHA-1: 90393d79561782657ed4ab6335cb17f26c2f2c81 SHA-256: ab2cb7f4a03366918d2e32b8fb29e9bee3a88f85fc1cc41da27b54ab08d1184e
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 0.9997

Heuristics 6

  • 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 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://xezojetit.ru/123?utm_term=mobile+bang+bang+vng+apk PDF link annotation
    • https://cdn.sqhk.co/fuvazuginu/ajmYfIg/tetris_ultimate_3ds_download_play.pdfIn PDF document text
    • https://cdn.sqhk.co/jetobatu/SPLhXqk/75764224885.pdfIn PDF document text
    • https://tulopudegiwidal.weebly.com/uploads/1/3/0/7/130739196/buxexa.pdfIn PDF document text
    • http://prizinsta365.site/instructions_for_applying_car_decalsqliwo.pdfIn PDF document text
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/728309d.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/sedavuzefavafoxazazokonihjtvp.pdfIn PDF document text
    • http://axecheat5.xyz/bodukagfczwn.pdfIn PDF document text
    • http://nijowefipegivu.iblogger.org/79471866750.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/jhjb64j/80763585648.pdfIn PDF document text
    • https://nigerizebamogut.weebly.com/uploads/1/3/4/5/134596745/sokekinog.pdfIn PDF document text
    • https://cdn.sqhk.co/woxipepevati/ji4gfgh/genoxajalevozewu.pdfIn PDF document text
    • http://mon-cmbretagne.com/hybrid_raptor_city_terrortr0nx.pdfIn PDF document text
    • https://nanotobu.weebly.com/uploads/1/3/4/6/134638189/sedovezotetisatun.pdfIn PDF document text
    • http://1xbets-regs.site/vonowatolufuf7kwrl.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/jjbhage/migokiwelox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_a6c0ecbbff6f40c6950749cd2b74393b.pdf?index=trueIn PDF document text
    • http://wamodaf.epizy.com/37807934649.pdfIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_b4d5cc3c326c4c989018c1dee35fd35d.pdf?index=trueIn PDF document text
    • http://nanesipub.rf.gd/24536088398.pdfIn PDF document text
    • https://d4e73f68-9870-4c81-be0c-0a6dd7607cd2.filesusr.com/ugd/6f53d7_4126ddfd4f0f4d5d9712ff594c3f719f.pdf?index=trueIn PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_0047312c2c0d468b9c6310ccd9cfd843.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_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 4980 bytes
SHA-256: 65e8a2f4b474571f69c85ac133e0e804f8f8863d0c53a2a873f4bc82214c11ca
font_01_sfnt_off0001081a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081A 23520 bytes
SHA-256: 6daecf6ccdc8ad32a0c6d89595d73778a8ba86dbd12752829f6af81b7fab9fa5

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