Malicious PDF — malware analysis report

Static analysis result for SHA-256 517ab8e4a2c8a0cf…

MALICIOUS

PDF

38.7 KB Created: 2020-04-02 10:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d73aae7baccaa29dc3171a19d6b7d542 SHA-1: b235baf9e5c83c2658cc515e4e0fbdcdfe797511 SHA-256: 517ab8e4a2c8a0cf137a9e668d7742014ec44b2449f8e91ed6818145c7609b7e
94 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links suggests a coordinated effort to distribute content or traffic to potentially harmful destinations.

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://jtsinnovations.net/uploads/1/3/0/5/130588315/130588315.html#nomenclatura+iupac+de+aldehidos
    • http://hightideandstilettos.com/uploads/1/3/0/8/130813357/divirubagotogupi.pdf
    • http://sacrederotictouch.net/uploads/1/3/1/3/131384605/ruxaxuxotinox-dosupoj-zufesa.pdf
    • http://destinationsanddishes.com/uploads/1/3/0/3/130313044/nikoreg.pdf
    • http://barshingerconstruction.com/uploads/1/3/0/7/130740561/kagakosumupusiso.pdf
    • http://thebuttertarts.com/uploads/1/3/0/5/130551351/sifakixaver.pdf
    • http://allthesedays.org/uploads/1/3/0/2/130273589/d67fe55b406.pdf
    • http://aluminumstraws.com/uploads/1/3/0/5/130551619/8771809.pdf
    • http://mspledgersclass.com/uploads/1/3/1/4/131407143/57a083f.pdf
    • http://floralsforallevents.com/uploads/1/3/0/6/130621444/bf83b651ae54.pdf
    • http://treredbeats.com/uploads/1/3/0/9/130969921/8970254.pdf
    • http://midlifesolutions.net/uploads/1/3/0/6/130620731/13babd3464b00.pdf
    • http://ivotesandy.com/uploads/1/3/0/2/130272241/tokokegiwiduguneber.pdf
    • http://maggieshousevalues.com/uploads/1/3/1/4/131437849/darulemepowu_nitojedowolilu.pdf
    • http://shaynamade.org/uploads/1/3/1/3/131380847/tumogul.pdf
    • http://sydneysurfphotography.com/uploads/1/3/1/3/131384185/3658964.pdf
    • http://cherylgrayfineart.com/uploads/1/3/0/5/130546024/ximixumokoju.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_off00006cda.bin
bf7e045b2108bdb7a74cc4574d5362b3abaf01e440822e845e197268d7a4a0d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDA 8640 bytes

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