Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36e5ea0be1598a8…

MALICIOUS

PDF

36.9 KB Created: 2020-05-13 04:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: df4959317d328677b77a832db06188d7 SHA-1: 59ebb8d1f76f6053ef81da69140625bfd6ca517d SHA-256: a36e5ea0be1598a8876ae59d0928449da69b374fa0fc04833b7bfef7b1bd2e1b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are dynamically generated and point to other PDF files, indicating a link farm for SEO manipulation or to distribute malicious content. The document body itself contains a misleading title suggesting a movie, which is likely a lure to encourage clicks on the embedded URLs. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://rochecenter.org/uploads/1/3/0/6/130603715/130603715.html#astitva+kannada+full+movie
    • http://theartoftea.net/uploads/1/3/1/6/131637302/zodozexu_tawun_losuv.pdf
    • http://quantumleapbehavior.com/uploads/1/3/0/6/130639350/2924958.pdf
    • http://misslewisbtech.com/uploads/1/3/0/6/130640092/zeloneborigeliripevo.pdf
    • http://gipsospremium.com/uploads/1/3/0/5/130588987/xifik-mezenapevufas-jonizirof.pdf
    • http://diosamedicalesthetics.ca/uploads/1/3/0/6/130605452/piwad.pdf
    • http://tuyyophotography.com/uploads/1/3/0/4/130489054/835237.pdf
    • http://pxrry.com/uploads/1/3/0/3/130379069/jitimilu.pdf
    • http://pushpullpaintlessdentrepair.com/uploads/1/3/1/4/131437092/ded423875.pdf
    • http://noahsarkessentialsllc.com/uploads/1/3/0/5/130550854/f7dc5b.pdf
    • http://ellieboussonworks.com/uploads/1/3/1/4/131453897/fedemupisupurebojif.pdf
    • http://lanesliquidation.com/uploads/1/3/1/3/131379956/fd2277a93a7d8.pdf
    • http://shroudsoft.com/uploads/1/3/1/4/131483383/maxujumezama-daluloter.pdf
    • http://thestartingate.com/uploads/1/3/0/6/130621555/768b953.pdf
    • http://vermidi.com/uploads/1/3/1/3/131380308/372849f2.pdf
    • http://mysteryshopperjob.us/uploads/1/3/0/8/130813144/bigitazuporewuxon.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_off0000653d.bin
ef2af82075817cf5bbef9c49df088bc391f10f5eb218a8b36b793d16f50f5427		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653D 10228 bytes

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