Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f1e060ee7736cc…

MALICIOUS

PDF

73.8 KB Created: 2021-04-06 13:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1b90cedce8363efc552c33ed55c7174e SHA-1: 9e4abb3e6a5be78fd2aa37f7079d67ff6ec3ae03 SHA-256: 09f1e060ee7736ccbbbc96ad34fa5d79d2d9fff0467a9a2cd400e40de4eb0e85
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 0.9995

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://seumenha.ru/strik?utm_term=my+lg+fridge+leaks+water PDF link annotation
    • https://zimidoxagomadap.weebly.com/uploads/1/3/4/8/134881953/xariji.pdfIn PDF document text
    • http://ig-soft-team.com/billyoh_playhouse_instructionsdrvdy.pdfIn PDF document text
    • http://fijigud.22web.org/personality_vocabulary_esl.pdfIn PDF document text
    • https://najigojuvunijo.weebly.com/uploads/1/3/0/8/130874658/3092260.pdfIn PDF document text
    • http://watomidipokaki.22web.org/23122570252.pdfIn PDF document text
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/9345861.pdfIn PDF document text
    • http://familyit.info/warship_craft_hack_ios_downloadgyh3m.pdfIn PDF document text
    • https://bozobazevadetob.weebly.com/uploads/1/3/1/6/131607158/e01d57b1aed.pdfIn PDF document text
    • http://dietnatur.fun/338335284426ihlu.pdfIn PDF document text
    • http://stnold.com/6_nimmt_english_instructionsiaqaz.pdfIn PDF document text
    • http://pollsexpert.com/43939232445rt14n.pdfIn PDF document text
    • http://xevojifixifepi.scienceontheweb.net/creative_writing_lesson_plans_high_school.pdfIn PDF document text
    • http://koprovk.xyz/towasuvupasowjkw.pdfIn PDF document text
    • http://bonifacy.site/7440573320wom0u.pdfIn PDF document text
    • http://forisawidokomor.sportsontheweb.net/multivariate_gamma_distribution.pdfIn PDF document text
    • http://reform-st.ru/ketowusonagujituvlglg9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/general_psychology_books_for_college.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/89742244306.pdfIn PDF document text
    • http://zigubogujivo.epizy.com/samefinamodag.pdfIn PDF document text
    • http://rupadulogoliwid.epizy.com/lelurenivuki.pdfIn PDF document text
    • http://zamajud.epizy.com/17284692072.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/tusaguf.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33F 5340 bytes
SHA-256: b9c23a674948d0dc266f00e115f430fb03572e144a4c92197a9f79cfc7a029d8
font_01_sfnt_off0000f5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A0 10588 bytes
SHA-256: d0e0c910b1a8dcee1d4fab2cb5e2f8e18a171d42b9bb91bc63c5651c26fe9888