Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5768b52b666ceb…

MALICIOUS

PDF

76.1 KB Created: 2021-02-28 18:42:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ec17af8aa78df5def7ad7f173e9b2ef1 SHA-1: d09fca89ea10a19f3debeeb96d0610da17ab72f1 SHA-256: 7b5768b52b666ceb6891f3e8c704b6e0b9f4c7ceba20ae6049ccfcd17562019a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a strong intent to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains a suspicious query related to sex offender residency, possibly as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/strik?utm_term=where+can+sex+offenders+live+in+nj PDF link annotation
    • http://just-gopro.com/nimizoreoi76w.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/tamudowabowiwamujo6njav.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/8icaghc/81649962825.pdfIn PDF document text
    • http://premiumpornclips.com/tarot_for_yourselfxfma0.pdfIn PDF document text
    • https://dubobovutorikug.weebly.com/uploads/1/3/5/3/135332124/c3198fdd009.pdfIn PDF document text
    • http://itnegozio.info/873617007992n253.pdfIn PDF document text
    • http://best-store.club/photo_studio_programam93t9.pdfIn PDF document text
    • https://lesaletalakiwop.weebly.com/uploads/1/3/1/3/131379456/903122.pdfIn PDF document text
    • http://khanapoorti.com/keurig_2.0_regular_coffee_machinegyab4.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/adliijg/trade_island_game_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/idFhhUo/fighter_jet_games_for_pc_free.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/93732640002q3yev.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/vAkaQgd/90446299073.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/RBiaUge/super_mario_bros_4_game_boy_advance_cheats.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 6

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_off0000ec77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC77 5324 bytes
SHA-256: 0492ba79583680f51bb891fe1adb5cc9261b762d3a5a9bfbd710029ce4b55904
font_01_sfnt_off0000fea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 10224 bytes
SHA-256: 17a5d57cd4cb2123c4f23f28bc8142b48127e054784392f318c1fa040296a4b7

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