Malicious PDF — malware analysis report

Static analysis result for SHA-256 5148f346740e66e3…

MALICIOUS

PDF

71.2 KB Created: 2021-03-11 22:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 76b383206e9ac2aad51a155fbc07352e SHA-1: 229de98cc93091372ae2d1ada423d8602fd1069f SHA-256: 5148f346740e66e3b855d9a5ce74d2a12d762413cbbac1ca28231d492eebc8e5
186 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 0.9996

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://botokaw.ru/strik?utm_term=traductor+ingles+espa%25C3%25B1ol+latinoamericano PDF link annotation
    • https://cdn.sqhk.co/lojadisexudo/R9Ahigj/xejipisekutixukaxasesole.pdfIn PDF document text
    • https://senovaxevuka.weebly.com/uploads/1/3/5/3/135304629/kekovodokid.pdfIn PDF document text
    • https://dawutika.weebly.com/uploads/1/3/1/4/131407504/1889633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467019/normal_60125ec0867f8.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/rnnGHjd/90656874211.pdfIn PDF document text
    • https://lifinupal.weebly.com/uploads/1/3/5/3/135336288/mamadugotinivere.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/FgjesBx/1136239961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408866/normal_600dd9f3b22ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379053/normal_5feccd48dbfb3.pdfIn PDF document text
    • https://semuvobe.weebly.com/uploads/1/3/0/9/130969465/5120886.pdfIn PDF document text
    • https://wabegikabakupoz.weebly.com/uploads/1/3/4/6/134668284/dikebizej.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/edd75403-1f15-4230-819c-a8e9ec07b3cf/rekefejisukogexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38599995-e141-4cbb-a981-cc1c5a85d305/88301005817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5341a2c1-3f99-4dc6-9f1c-7bb4dfb9f564/ritter_m11_ultraclave_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdeef8b8-6f43-4619-acb9-e2ecf311674e/how_to_make_a_really_good_rap_beat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/070f74f1-0e24-4a6f-91a9-9e41428d762b/94065627057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb4dcfd9-ea8d-448f-9bbc-6babdac5ddb2/36736366260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d17aefa-034d-4caf-82c2-69ccd9151a67/logic_pro_x_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ff5411-b90b-425b-a505-a3dd15d92130/kenmore_elite_he5_dryer_will_not_heat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd50904a-de72-4dbe-86f0-81d6a8bca331/35425273337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2155f7b-d173-4412-824a-c13cec40263a/luliwefukonanixi.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_off0000d45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45C 5556 bytes
SHA-256: e064f9614adf93294cef29b2476c65c478c3255c5a6738212021d49877642803
font_01_sfnt_off0000e6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E3 12216 bytes
SHA-256: b513f75c25f7679b43540eb5c950c0026cd7af81431ccaf03ad12bba2e6bb15f