Malicious PDF — malware analysis report

Static analysis result for SHA-256 6984ff46ba8e5485…

MALICIOUS

PDF

75.7 KB Created: 2021-06-02 02:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: caf10f49f981a06967b2859563912dbf SHA-1: 53094cb068cd60ac5a2298300a5841ffd0098806 SHA-256: 6984ff46ba8e548501e474e93d60f59e1bce30009239e872cf92418a3a2ea853
206 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 0.9991

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://philabc.ru/pbw?utm_term=why+is+my+rogers+modem+flashing+red PDF link annotation
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/7428747.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466367/normal_5fdf6481c8760.pdfIn PDF document text
    • https://donedupefunesu.weebly.com/uploads/1/3/1/6/131607777/kenewapobizepetoluja.pdfIn PDF document text
    • https://xumusozopojuvuj.weebly.com/uploads/1/3/1/3/131398507/jujasesekuj-vixixopife-woweba.pdfIn PDF document text
    • https://girowefado.weebly.com/uploads/1/3/5/3/135349553/natokigojiwef.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/1052574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_6059b72c6eb98.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/e2c6605b.pdfIn PDF document text
    • https://rufawakifored.weebly.com/uploads/1/3/1/8/131856207/e1cc32.pdfIn PDF document text
    • https://tosoremekik.weebly.com/uploads/1/3/4/7/134771766/b4c5f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408991/normal_5ff56025acade.pdfIn PDF document text
    • https://bitugibetofovo.weebly.com/uploads/1/3/0/9/130969362/6296357.pdfIn PDF document text
    • https://kegazesawatodo.weebly.com/uploads/1/3/4/3/134378031/berufab.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/c026d77e-5a45-41a0-8aa3-3507e4c34707/5530834843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855dbd29-b5de-4f2a-af45-b54143465384/livixudijinefisefibafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c96374c4-f285-436c-b875-e04c8b026e31/zafezoberogupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a45b3e-7df7-43a5-9003-3376d92c19fc/robert_collier_obituary_montezuma_ga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf31e9d-43fa-40ed-b99c-16f4f38438a4/72526453906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af4a0b4a-672c-437d-90ce-1f762792eb16/subaru_pressure_washer_3100_psi_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/423ad351-876d-4d71-8ef2-1a22d504e45c/fuvoxebolis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed6d0211-ce2f-4319-9996-8a25d5f25838/holmes_hepa_air_purifier_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89acea3-140d-465e-9af6-fbc37f9f543c/childhood_and_adolescence_voyages_in_development_5th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d030dd8f-e514-4f1f-b0f7-fbcd9eec15c8/pijagasurolip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fdb188e-408f-402c-aab1-a8c20df3f06d/low_calorie_indian_food_list.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_off0000ea7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7F 5436 bytes
SHA-256: 1c761bf5d7cba46b2ca94f0127f6f566ef577758f394ba4e6b5d5a703697970c
font_01_sfnt_off0000fce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE4 10636 bytes
SHA-256: e2eebc5bd5706a2ae929fccd08215f005dc52441987f0ff315b7a45cf461c67a