Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f57abe9324230f…

MALICIOUS

PDF

38.3 KB Created: 2020-03-29 05:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1fa995ee56eec866b04f293800eb1932 SHA-1: fb54617e25df37a6cabf4404a005702b1d5d3302 SHA-256: f5f57abe9324230f93d35eddae327b3abb38472988c0f530e7933415be98cac9
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains references to these URLs. The primary function appears to be a link farm, likely intended to manipulate search engine results or distribute malicious payloads via the linked PDFs.

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://pameladirnberger.com/uploads/1/3/0/5/130551589/130551589.html#los+3+idiotas+hindu+resumen
    • http://salonpinkbus.com/uploads/1/3/0/5/130590578/4090509.pdf
    • http://wakesurfingtips.com/uploads/1/3/0/8/130814596/zatimexudiwabesemar.pdf
    • http://mail.callbuddys.com/uploads/1/3/0/2/130289347/doduzizepenukunize.pdf
    • http://mk-shots.com/uploads/1/3/1/4/131438188/zesiluneke_bevululilosokaw_mijolizixepevuj_tanub.pdf
    • http://www.cerrajeriaydisenocalifornia.com/uploads/1/3/0/7/130739159/pawawume.pdf
    • http://oliviaandkevin.com/uploads/1/3/0/5/130540874/12e3a09317ae262.pdf
    • http://www.pelegreenberg.com/uploads/1/3/0/5/130589031/niluzijide-geveluviri-vononawexe.pdf
    • http://trevordewitt.me/uploads/1/3/0/3/130379147/datojinuxo.pdf
    • http://nationalchristianhousingconference.org/uploads/1/3/0/7/130740218/58fc6722c0a145.pdf
    • http://opportunitybaseball.com/uploads/1/3/0/2/130289515/181aa9.pdf
    • http://www.knapontwerp.com/uploads/1/3/0/7/130739766/nunoxepifo-gulepifadopoke.pdf
    • http://adoxian.com/uploads/1/3/0/2/130271011/2261769.pdf
    • http://wekickseriousbutt.com/uploads/1/3/0/5/130589174/59973d.pdf
    • http://mta-sts.mx.empoweredthroughchoice.com/uploads/1/3/0/3/130323319/412491.pdf
    • http://hillaryjzaranti.com/uploads/1/3/0/7/130738511/tegeza.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_off00006b67.bin
b061f5439f339c51efe080244302fa298c7d7c129bc785adb60e788de4707572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B67 8552 bytes

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