Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29720224cba5239…

MALICIOUS

PDF

55.8 KB Created: 2020-03-06 15:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 382be6928e100ba5c18cc46f4e3c8a3e SHA-1: 93df30e6ab03494482c8b9e2513af679bbaffd22 SHA-256: b29720224cba5239a5b93dc3b2c002a7333549fda1587caf7f1dd9c7dd31c45d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links to other PDF files hosted on various domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary purpose appears to be directing users to these external resources, which are likely malicious or used for SEO spam. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://euylil.bdgct.com/uploads/1/3/0/2/130288378/130288378.html#fateh+khyber+ka+waqia+in+urdu
    • http://hostmaster.goringhall.live/uploads/1/3/0/4/130478566/mowasobavidosa.pdf
    • http://bataleur.ca/uploads/1/3/0/4/130483219/soboxifuku.pdf
    • http://billandstanleyoystercompany.com/uploads/1/3/0/7/130740173/mepibelufer_kofaxalawolozar_sapiwiwuruva_somixofi.pdf
    • http://mail.psychdirections.com/uploads/1/3/0/8/130814234/6949901.pdf
    • http://ruthshortt.com/uploads/1/3/0/9/130969238/2273133.pdf
    • http://swainboard.org/uploads/1/3/0/2/130289334/zopodizeku.pdf
    • http://repax.network/uploads/1/3/0/4/130476237/98fa185588.pdf
    • http://hostmaster.thebathbombshop.co.uk/uploads/1/3/0/7/130774977/jumofafutatod.pdf
    • http://newportbayconstruction.com/uploads/1/3/0/2/130287533/570433.pdf
    • http://clothing-designs-1.walnuthilldesignsllc.com/uploads/1/3/0/4/130478123/kokezafebibenuf-deluxedupumaken-dawuluzuk-pefutikujuj.pdf
    • http://www.yearofgames.com/uploads/1/3/0/4/130489097/ea2426ef0.pdf
    • http://wrappedupinlove.com/uploads/1/3/0/5/130551214/3549115.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afb0.bin
efb007e316c0f69e6b2f5a2f564453b9dfb17280c341c99951b4c1dc2449c21c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB0 8560 bytes

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