Malicious PDF — malware analysis report

Static analysis result for SHA-256 619480872bc88a7c…

MALICIOUS

PDF

94.8 KB Created: 2021-05-22 17:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f4ff0604213ddd1457c6c09fd9c4e059 SHA-1: 77331009280d957ab904e0436e17694f5a53dc90 SHA-256: 619480872bc88a7cab352a5625c277bc6e7cc40f47200ed05b0fa0b6a7a15b7b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://resalured.ru/strik?utm_term=adeptus+titanicus+rules PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473616/normal_5fe7525c6d986.pdfIn PDF document text
    • https://pokiwaminexaga.weebly.com/uploads/1/3/1/6/131637240/ad8979.pdfIn PDF document text
    • https://jeboxuxu.weebly.com/uploads/1/3/2/7/132710743/kukajom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444095/normal_5feb4d957c44e.pdfIn PDF document text
    • https://gubulugovidenu.weebly.com/uploads/1/3/1/4/131406252/demop_bajusogez.pdfIn PDF document text
    • https://zawiwiguxasawum.weebly.com/uploads/1/3/0/7/130739629/pitasilunodose.pdfIn PDF document text
    • https://tovejuzu.weebly.com/uploads/1/3/5/3/135398771/telul.pdfIn PDF document text
    • https://nirotagikul.weebly.com/uploads/1/3/5/9/135992947/tiforarewigom-fijidawunovowe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/965a4578-92f9-4c51-b6ad-379b05efb948/59320710192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a858d6ff-f541-43d2-a4c8-bd0aebcbf692/19198842294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbaaa774-ed27-4515-88a2-5fb2fe118425/norcold_refrigerator_reset_circuit_board.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/safovudotojomugefugirax.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/52105941980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3c584a-434d-433e-a271-026551672ae0/67763120596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf3c2af-cc00-4e72-bef7-52a925e63d7e/nimugulutopefugukavare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4ffabc2-86e3-4846-a104-0d28ada89283/90597890140.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12998 4828 bytes
SHA-256: 8ec651024ae91bbeb7233261a7cc0abce974ab4a98229ca2db5b8865b3b30296
font_01_sfnt_off00013a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A01 11156 bytes
SHA-256: ba06e276e0d8efd430731ea2cc9bd1c598c48a47b0edee7c720a0475227072f6
font_02_sfnt_off00016013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16013 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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