Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef06041c3de0eb3e…

MALICIOUS

PDF

68.8 KB Created: 2021-01-30 05:44:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3a469115c6153e7e02426e099a342f5e SHA-1: e496c8b7d3ec3a4cf32d1569cb8451aaee49a449 SHA-256: ef06041c3de0eb3e1e22e5e619907814825ac1662c6b76262ffff70d504ad1e5
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to facilitate the download or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/aws?utm_term=london+transport+police+report PDF link annotation
    • http://esclick.pro/zaterolarawonivozovajilasfzija.pdfIn PDF document text
    • https://lakadepoti.weebly.com/uploads/1/3/5/3/135301691/4088052.pdfIn PDF document text
    • https://talekadibozevo.weebly.com/uploads/1/3/5/3/135393667/baluduz.pdfIn PDF document text
    • https://varovugunigode.weebly.com/uploads/1/3/4/4/134480676/1384190.pdfIn PDF document text
    • http://perevod-card2card24.site/drifting_po_angielskuo8nqc.pdfIn PDF document text
    • http://xonibiz.22web.org/1283404853.pdfIn PDF document text
    • http://4gusevshop.website/pixel_gunner_apkjr012.pdfIn PDF document text
    • https://betirowi.weebly.com/uploads/1/3/4/6/134661799/rudavumug_sekugate_tinejaziw.pdfIn PDF document text
    • http://ig-copyrightnotice.com/1000_verbos_en_ingleschny5.pdfIn PDF document text
    • https://pananufizusa.weebly.com/uploads/1/3/4/4/134445813/zinadep-fawej.pdfIn PDF document text
    • http://milanbeachs.space/road_trip_travel_planner_freesvnuo.pdfIn PDF document text
    • http://idealsit.fun/3148808755yg2b6.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/dexiwelo.pdfIn PDF document text
    • https://daguvosiliwu.weebly.com/uploads/1/3/1/4/131406153/parisajaxin.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/zonivezada/44173951868.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/megalovania_trumpet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/bestech_thermostat_bt21np_manual.pdfIn PDF document text
    • http://xidafusotiba.epizy.com/povinirisidikisev.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_off0000d306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD306 5008 bytes
SHA-256: 63665dd55cf11b78621ac58a4764b8b0fe676196501e82bb1d8fa89d643ae620
font_01_sfnt_off0000e41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41C 10112 bytes
SHA-256: d76275d6faba70514a28456c9631e2cb36e8004ce3d96816da34b761ad2ee283

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