Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a4962d6e12a899…

MALICIOUS

PDF

37.0 KB Created: 2020-05-20 17:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad111ecc92eddf5bfb905ad06deac964 SHA-1: 118ab4758d23bce6c0b7e04309446d39f7b042f8 SHA-256: 03a4962d6e12a899a508da3172e222200c2e068be2007808a344433f551bf660
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute additional malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the embedded links.

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://somersetfoodtrail.org/uploads/1/3/0/4/130476440/130476440.html#mountain+man+brewing+company
    • http://cocobungalow.net/uploads/1/3/0/3/130323471/7072193.pdf
    • http://lifespanoccupationaltherapy.net/uploads/1/3/0/2/130272283/tilulaxed-jiteniretik-xizetax-xerinozafatexaf.pdf
    • http://playwithpwn.com/uploads/1/3/0/2/130270882/narulo.pdf
    • http://kaparnman.com/uploads/1/3/0/6/130604327/3f9bc7dbbb5.pdf
    • http://wildnestboutique.com/uploads/1/3/0/8/130813409/5a56f0e9.pdf
    • http://eyecandyshape.shop/uploads/1/3/0/4/130490561/wipujigozuxut.pdf
    • http://floreseralasalud.com/uploads/1/3/0/7/130738700/mugate.pdf
    • http://melrosebridal.com/uploads/1/3/1/0/131070539/8005029.pdf
    • http://counterboycott.org/uploads/1/3/0/3/130313274/defedugiju-pavadon.pdf
    • http://renewalleave.org/uploads/1/3/0/9/130969701/damotesom-liwunegis-luzebivogupe.pdf
    • http://enlightenedastrologycourse.com/uploads/1/3/1/3/131383761/dirotasekuv_xukoxam.pdf
    • http://chrismjohnson.net/uploads/1/3/1/6/131636665/8541200.pdf
    • http://mccutiescreations.com/uploads/1/3/1/4/131408581/2328540.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006417.bin
f4e70b13f1885eb832c48581de17284bd7f511e4fb73a834d9319de7cf0035ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6417 10820 bytes

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