Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29924474ad9819d…

MALICIOUS

PDF

72.2 KB Created: 2021-06-09 01:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e25edb70de5b6fc7df68db3ab4be7e9a SHA-1: 90f46b8cba9f8b64f816676778417df7ee194cd1 SHA-256: c29924474ad9819de7a1debb632ea07314490b642c1ff44fe9106466c8610e30
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

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://pistant.ru/pbw?utm_term=order+of+percy+jackson PDF link annotation
    • https://naletonuve.weebly.com/uploads/1/3/4/3/134381452/gamota-tonekewakubemof-gesaw-semopiduwiga.pdfIn PDF document text
    • https://womolikusewafok.weebly.com/uploads/1/3/0/9/130969044/kapopabipidodik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487184/normal_6036e0eea708e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374175/normal_5ff5038cef100.pdfIn PDF document text
    • https://lifufamaz.weebly.com/uploads/1/3/4/6/134685481/d6d927.pdfIn PDF document text
    • https://sepebukov.weebly.com/uploads/1/3/1/4/131408100/nalofalo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_5fec791d620c1.pdfIn PDF document text
    • https://nakixeke.weebly.com/uploads/1/3/4/3/134354053/rowenon_sekolivez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_604d8dbbd4f38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_60bfe5daa3ae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418968/normal_606610ca2deda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482230/normal_6037ed529502e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488604/normal_60051ab38eacb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465400/normal_604844728905f.pdfIn PDF document text
    • https://natozimokuwepef.weebly.com/uploads/1/3/4/3/134398015/1935709.pdfIn PDF document text
    • https://samitezoderedo.weebly.com/uploads/1/3/4/4/134488512/jubanogebutonu-ximopikojov-jitifewojolugaz.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/970d555d-147d-42e7-ac38-3fa5359838cc/tukiwukamenudum.pdfIn PDF document text
    • http://biduzoku.pbworks.com/w/file/fetch/144614199/13050237598.pdfIn PDF document text
    • http://gugatodoka.pbworks.com/f/18082079391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff5a919-5386-4ea4-936f-4c373ddd593d/46245447505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bd7d9b-9637-47dd-9ddd-94956989b2f7/pokatubidolezanagomiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f7e8e2-23ee-42c0-9f5b-d738128c914c/rubiks_cube_solution_3x3_world_record.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de06ff6c-c8ff-4682-9a12-b1c6684aebc6/thirteen_reasons_why_intro_song.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_off0000ddc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC7 5388 bytes
SHA-256: cb11d1a6043cf650ee6c0170bcbcb5f67e8fe2691a140a81ffb68ab078b59aa9
font_01_sfnt_off0000f03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 10332 bytes
SHA-256: 2446a8d7b01f81ff637f2818df819e903cea6178872db87107a080c8abc9a8a2