Malicious PDF — malware analysis report

Static analysis result for SHA-256 6050c3657449b490…

MALICIOUS

PDF

66.4 KB Created: 2020-11-18 03:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3c44bfe0522064b86ca91f27a5eb1b40 SHA-1: 17fc201e3ee8f9dbe43de9b9fca06a1cc2cf24af SHA-256: 6050c3657449b4904dd573620b438e37e8eb3fd5b8ca088f5a32dede7226b53e
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 ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity, likely to redirect users to harmful content or phishing sites.

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://trafffi.ru/123?utm_term=see+through+shorts+with+flowers PDF link annotation
    • https://somuwozav.weebly.com/uploads/1/3/4/5/134525430/e2ac61e4f8.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/3738915.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/gaveded_ketoge_noximunevilimad_fenera.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/xisub.pdfIn PDF document text
    • https://bowogemiris.weebly.com/uploads/1/3/4/3/134316512/1280cb7202.pdfIn PDF document text
    • https://talupujepanuzan.weebly.com/uploads/1/3/4/5/134595677/b15c8a6f.pdfIn PDF document text
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/4409550.pdfIn PDF document text
    • https://kotafogora.weebly.com/uploads/1/3/4/3/134322717/vunikigiwudigizosug.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/fikebigaromasifakuf.pdfIn PDF document text
    • https://zexafufu.weebly.com/uploads/1/3/4/5/134510694/josalumid.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/1fd98710-404d-423f-806c-91ddb1a220f7/lesakafujazoxume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b590b97a-53a5-45a0-b0d8-c7b2fcb1021b/new_deal_coalition_african_american.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e32f1c-de18-4588-bd85-223179e1de19/xototafuxaxixodanow.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/9387863023.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_off0000c8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DE 5012 bytes
SHA-256: e473394e5e320427d81511b50d3c2e19a471fd8d5320318f9283f56a3372751e
font_01_sfnt_off0000d9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FB 10124 bytes
SHA-256: 2ff983a0e37bbc1d8b6f2acc49044f12ce8502b6d0f92acf604c65c7b86ed3b7

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