Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe999179e59d174…

MALICIOUS

PDF

127.9 KB Created: 2021-03-24 11:24:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 40bb33c08ffcdc7ddeeec3b205af0213 SHA-1: b5fc37408bde1701957e7844769d3c415257d067 SHA-256: 0fe999179e59d1744b1cf0e497fbb8e3d674bc21d719bb3df7d61272d8ad6afb
134 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 and presents a deceptive download button. 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/123?utm_term=top+5+android+games+of+2015 PDF link annotation
    • https://goneduxif.weebly.com/uploads/1/3/0/9/130969586/a3de9c38.pdfIn PDF document text
    • http://basiditdcf.space/ward_newsletter_bishopric_messagedf1fs.pdfIn PDF document text
    • http://wovoradomumakil.medianewsonline.com/although_in_spite_of_exercise.pdfIn PDF document text
    • https://janusizexagelu.weebly.com/uploads/1/3/5/3/135337128/4e405da70.pdfIn PDF document text
    • https://wexivupesowapab.weebly.com/uploads/1/3/2/7/132712225/5649449.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/epf_withdrawal_form_19_c.pdfIn PDF document text
    • https://bezofaxifi.weebly.com/uploads/1/3/1/6/131606652/9926365.pdfIn PDF document text
    • http://tagoturuluro.medianewsonline.com/lavibozipo.pdfIn PDF document text
    • http://reduslimitaly-official.website/news_media_bargaining_code_abckdci0.pdfIn PDF document text
    • https://bitoxogosem.weebly.com/uploads/1/3/4/3/134386372/1169661.pdfIn PDF document text
    • http://lavkavkusa.store/zijulazuroxuvokepurusajgeps6.pdfIn PDF document text
    • http://paypallsecurity.com/rexajiberedupbcpk.pdfIn PDF document text
    • http://kamijuzexujap.iblogger.org/toro_snow_thrower_parts_near_me.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/e39f33f2-9d86-4e4a-aa7b-00eebac2703f/how_to_change_xfinity_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/549758df-80d8-4f56-b680-d39f6ad750f1/how_to_turn_off_dhcp_on_verizon_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99552262-1a12-4f9a-a877-5f83d73510c4/broan_stove_hood_repair.pdfIn PDF document text
    • http://baletax.onlinewebshop.net/glioblastoma_multiforme_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22803ca6-7d16-4e37-ad0c-fee53f7f071c/vukoluboziwakotebikavezej.pdfIn PDF document text
    • http://zegiwewezenaro.myartsonline.com/taco_bell_nacho_supreme_ingredients.pdfIn PDF document text
    • http://kixasudasiwub.epizy.com/maytag_front_load_washer_error_codes_f02.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dbb9de8-21b1-4811-a656-915aa4a73990/90965009477.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AA 60492 bytes
SHA-256: 8f1d125297e9f518acb4ce9b89d7589e6080b816cf7f8b052be6f33135801696
font_01_sfnt_off0001b861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B861 5728 bytes
SHA-256: c278e41fb6d6e89eb879060bebeaa54ccc64d99b2d402b237c3c6c662df268bc
font_02_sfnt_off0001cbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBD5 11072 bytes
SHA-256: 82e32b41a7cafc28284470d6d4d2e3cf7c4a977dd8ab0760965dc8f4c71a4f4c