Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa51d67fffdc327…

MALICIOUS

PDF

71.4 KB Created: 2021-03-06 15:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b1955873d4eb2d928196587fb81cf4b4 SHA-1: 755a67d0d4c3f76e662557a963a86f989dc1eb52 SHA-256: 2fa51d67fffdc3277293b44a612990d7eebd2ce437cdb52793e5bfbc9bd51989
194 Risk Score

Malware Insights

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

This PDF file contains a significant number of external links, characteristic of a link farm, with one URL pointing to a suspicious domain ('maypoin.ru'). The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/strik?utm_term=jane+doe+eye+of+the+beholder+full+cast PDF link annotation
    • https://cdn.sqhk.co/kezavilageg/bget1hf/break_loose_glass_breakout_brick_breaker_balls.pdfIn PDF document text
    • https://jarowezib.weebly.com/uploads/1/3/0/8/130813985/ratidodi_boniboja_rituzekasolero.pdfIn PDF document text
    • https://wozepunelom.weebly.com/uploads/1/3/5/9/135993859/giberusupebawa.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/72256671038.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/2396321585.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwutu/hghcAgh/exoskeleton_suit_for_sale.pdfIn PDF document text
    • https://jupagefux.weebly.com/uploads/1/3/1/3/131398252/6012577.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/eWigggj/moto_traffic_race_mod_apk_unlimited_money.pdfIn PDF document text
    • https://lejumapufa.weebly.com/uploads/1/3/4/6/134688193/56d4047b46f4c15.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/cRyihjc/raspberry_pi_2_pinout_diagram.pdfIn PDF document text
    • https://tekudijasefemo.weebly.com/uploads/1/3/2/7/132740256/sukaresuzuzulaz.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/icgiaid/draw_it_all_out_mask_walgreens.pdfIn PDF document text
    • https://kagodititaf.weebly.com/uploads/1/3/4/8/134868324/xasogafuweginog-fejuvopa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/20bcc9fc-d334-484b-ab63-8924d3e6257d/32148971635.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/23534383114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae08cf0-d832-408e-85c9-ebe39f37c851/moroxivobubizolurobojeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc869c57-06db-431c-864c-a468adedd78a/brinkmann_smokers_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44910822-628a-4cdb-97ae-549ecf16bf92/hp_p3015_driver_win7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/bergson_time_and_free_will.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9949f64-91bf-4f4e-8570-a01ba2eaa750/nafiramexoxilijafo.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_off0000d8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8ED 5340 bytes
SHA-256: 4623187fe59f4fd5aff094cf26d60bf731f073aa9d744abe06db4f821fa35142
font_01_sfnt_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 10876 bytes
SHA-256: f9ad08d86183bbf2702594fb49f7227b6beedd814157c6af344e1f2ee4a9a29b