Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa6f97995a3371f…

MALICIOUS

PDF

80.3 KB Created: 2021-05-28 21:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: fc8c350610663a0b5f69d7c0101b744e SHA-1: e47d7592d45c31dd2c76d98c10c26c9f04444c9f SHA-256: 6fa6f97995a3371fe3a5076b97af873c34e39c61969f5bd8c1a8ae33e1a62e14
186 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or a scam, leveraging the document's title as a lure. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/strik?utm_term=how+to+move+a+front+loading+washing+machine PDF link annotation
    • https://tekeginisexufu.weebly.com/uploads/1/3/1/3/131381150/9166857.pdfIn PDF document text
    • https://tavefagizukog.weebly.com/uploads/1/3/0/7/130775361/398934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477376/normal_5fd1fec8a93ec.pdfIn PDF document text
    • https://jurojapelo.weebly.com/uploads/1/3/4/8/134878956/71c9fb6b4f0.pdfIn PDF document text
    • https://laxonetamaj.weebly.com/uploads/1/3/4/0/134096763/4035801.pdfIn PDF document text
    • https://sezokifor.weebly.com/uploads/1/3/4/5/134596047/4131192.pdfIn PDF document text
    • https://gomamuna.weebly.com/uploads/1/3/5/3/135304292/9dda5.pdfIn PDF document text
    • https://wubobuxidozexe.weebly.com/uploads/1/3/4/3/134322977/senefut.pdfIn PDF document text
    • https://kexezesokofu.weebly.com/uploads/1/3/3/9/133986719/ccc24724afb9c72.pdfIn PDF document text
    • https://jegivobepumo.weebly.com/uploads/1/3/4/4/134444156/remobezir_miwalejitekaju_xevogidarawi_judevenovud.pdfIn PDF document text
    • https://tokikagusiwa.weebly.com/uploads/1/3/4/0/134096322/lireb_gelit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473645/normal_5fee9b8a9b0c4.pdfIn PDF document text
    • https://rowusebejaron.weebly.com/uploads/1/3/1/6/131637242/jilovegiv_defibejej_jiwuw.pdfIn PDF document text
    • https://sadavixiji.weebly.com/uploads/1/3/5/3/135333995/peweruleturi.pdfIn PDF document text
    • https://noribazab.weebly.com/uploads/1/3/1/8/131871745/1629627.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/880d0489-55a2-45f0-928b-65711e527322/caracteristicas_fisicas_de_disacaridos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bdba399-18ed-4279-96c0-1656fba373e1/citizen_eco_drive_divers_watch_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de2adfc-f7cd-4b0e-abbd-681e97e24840/what_are_some_of_the_best_stories_in_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1849c31-dab6-4be9-9d9b-cbe7fda20204/does_oral_b_or_sonicare_clean_better.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8c8079-5e54-439e-a71c-f805b03c25c6/wing_chun_training_dvd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cafdabf3-3e46-4ca4-8155-ea7c5c7ff63b/87205852278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34a4e971-e4b6-404a-bb43-3045162c4f92/tipigawobazofenexok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8677b79a-81c3-4aa9-8ce3-3464c0f53e21/how_to_find_the_osmolarity_of_a_potato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e73bf03b-23e3-4224-81e6-18cc1c1b3a15/olympus_om_10_manual_adaptor.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_off0000f9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BF 5548 bytes
SHA-256: 1887463263d7b7c2baf14e37693d3c564a021a6d8984b86f88729858febd675d
font_01_sfnt_off00010c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8D 11468 bytes
SHA-256: 33a9a5c390e2b609495c92a1ac4c2daa209fba2d6e96ab765afbc4776b5afbe7

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