Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab86254e1b597d7…

MALICIOUS

PDF

137.7 KB Created: 2021-03-15 22:18:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ae4de4ff930334a61c9a80629566b02a SHA-1: 1cfd95e594ce51fd5689cec52e1b256a1679ead9 SHA-256: aab86254e1b597d7447b79323ae00d2a5388c9e93cb0696007392e4967cf0e62
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://gimoguvi.ru/123?utm_term=auto+rotate+widget+apk PDF link annotation
    • http://twenty-promo2020.ru/pgcet_computer_science_booksawtl5.pdfIn PDF document text
    • http://muwawukiseka.iblogger.org/bimanual_synkinesis_meaning.pdfIn PDF document text
    • http://baltika-trans.ru/fanudilakinetezemusinotd0ac2.pdfIn PDF document text
    • http://totalcreditcheck.info/ziwisozotuvadedefidodfith0.pdfIn PDF document text
    • http://copyright-security-ig.com/jefavitefurn7t8w.pdfIn PDF document text
    • http://xamakag.iblogger.org/57712561323.pdfIn PDF document text
    • http://tibetterrier.ru/sozidakafiselatabokoxotifvqd2.pdfIn PDF document text
    • http://swiss-gear-top.xyz/18453128621rx2q2.pdfIn PDF document text
    • http://qrastenmap.online/sevevifcnf08.pdfIn PDF document text
    • http://the-glow.ru/89689796604tkt3x.pdfIn PDF document text
    • http://floradoma.net/y8_games_bike_bmxmud3j.pdfIn PDF document text
    • http://shop-kid-toys.online/most_powerful_quotes_ever_spoken_in_hindiphjxc.pdfIn PDF document text
    • http://balifruit.com/20929254809tyyaa.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/rexogeguxosix/18169502524.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/cluedo_game_sheets_uk.pdfIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_e3f5aa2907854506a7788a8e3ca38577.pdf?index=trueIn PDF document text
    • http://nerofote.rf.gd/43296974065.pdfIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_e2707d19762e47fca48a207812db7b7e.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBE7 5060 bytes
SHA-256: 09a95ea120d4d4ca5f9c3c6702c6639fc1782a806eedac0f04df35e75fb91450
font_01_sfnt_off0001ed41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED41 12632 bytes
SHA-256: 8f59f5a365a4588e6e28abab550c248e9e5a5e93928cdbb8f88db35660d8a5fb

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