Malicious PDF — malware analysis report

Static analysis result for SHA-256 3504268201aa4784…

MALICIOUS

PDF

69.5 KB Created: 2021-02-02 22:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 696769b3551a2bcf1724197d17414f04 SHA-1: 964f4b700b7d45faa339c8a5828b525b4bf5759a SHA-256: 3504268201aa47848f9390a2decf6c04e8258a49adbf4f04a8a02a57e894efcc
186 Risk Score

Malware Insights

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

The PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/aws?utm_term=carving+designs+images PDF link annotation
    • https://ketuvukelese.weebly.com/uploads/1/3/4/3/134351906/946634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_6016ff27dac65.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/lasolidadewov.pdfIn PDF document text
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/0b5c20.pdfIn PDF document text
    • https://popagupo.weebly.com/uploads/1/3/1/4/131407300/tigavaje-limipel.pdfIn PDF document text
    • https://riwusivi.weebly.com/uploads/1/3/4/9/134900433/rubukota_rugoxelanem_lupujogowuva.pdfIn PDF document text
    • https://nekitunanozot.weebly.com/uploads/1/3/5/3/135346928/monelupovexoje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420764/normal_6007e2fa03c9c.pdfIn PDF document text
    • https://cdn.sqhk.co/matezafun/Fid4yeS/pemabitotegasa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/kuxugevagebuxolidurub.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_off0000d4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D8 5080 bytes
SHA-256: 1a8d31a5ea654d40d3fb42b0385af4487be42c9ffc8b423d8caad89573a4c150
font_01_sfnt_off0000e60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60B 10504 bytes
SHA-256: f040c09bb1728af60647f72791bfce5b04f0466e084f833de3774dd354a29cab

Open this report in the interactive analyzer, or submit your own file for analysis.