Malicious PDF — malware analysis report

Static analysis result for SHA-256 4049676b75e51c9f…

MALICIOUS

PDF

83.3 KB Created: 2021-03-10 00:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 496c9514f44bf7809a498767a5e8a9f5 SHA-1: 14f6d3bdee8f47718144568f854d2f1b60bb2984 SHA-256: 4049676b75e51c9fc5840114225c1d48d2c89daf5f3bb0f9b42fe1bfe2b61392
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-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://kuzutuzo.ru/123?utm_term=best+android+launchers+not+on+play+store PDF link annotation
    • https://bopilopuneliniw.weebly.com/uploads/1/3/5/3/135304065/sudugaw.pdfIn PDF document text
    • http://fitness1.space/lagevileboxidisivumheusv.pdfIn PDF document text
    • https://senidexug.weebly.com/uploads/1/3/0/7/130775540/xibugurum.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/568400273d.pdfIn PDF document text
    • http://tetizeniwa.mypressonline.com/wilderness_survival_kit.pdfIn PDF document text
    • http://vudifabofugejij.medianewsonline.com/vofegodusonuk.pdfIn PDF document text
    • http://temppicture.xyz/jovizejemijodepumijijirf5qa.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/harman_accentra_parts_diagram.pdfIn PDF document text
    • http://rezisekuvaz.mypressonline.com/organizational_behavior_textbook_13th_edition.pdfIn PDF document text
    • http://tamakar.tech/sig_p229_legion_rx_iwb_holsterhf3dy.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/66282323585.pdfIn PDF document text
    • https://xitirume.weebly.com/uploads/1/3/4/3/134392652/5673153.pdfIn PDF document text
    • https://fokomawirofuteb.weebly.com/uploads/1/3/0/9/130969657/a0ab7d3620.pdfIn PDF document text
    • http://pusapev.scienceontheweb.net/seniroxanugipezafefugo.pdfIn PDF document text
    • https://disovipogazita.weebly.com/uploads/1/3/1/3/131398104/muriwelujilafo.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/20185857309.pdfIn PDF document text
    • http://tonipoj.iblogger.org/39980178266.pdfIn PDF document text
    • https://dudafenerow.weebly.com/uploads/1/3/4/9/134900552/3985922113e28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lenadupubop.rf.gd/android_java_checkbox_group.pdfIn PDF document text
    • http://pimudovi.epizy.com/repevimipegozelubiza.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

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_off000109af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AF 5312 bytes
SHA-256: 62855bf043207e2dfd7523ff923f5fa66a8ed33bf0741cbbacebd28696037c08
font_01_sfnt_off00011bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC0 10444 bytes
SHA-256: 5a6ea67289b73591bd64b525a48d6236642920b3e5c443158d2aa807e86d160d

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