Malicious PDF — malware analysis report

Static analysis result for SHA-256 0844980ebb5f287f…

MALICIOUS

PDF

43.3 KB Created: 2020-04-13 12:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8bd89faf58051cf42da317666ee479ff SHA-1: 155952ead4c9898e8c2a4966f87f093552dfe2d3 SHA-256: 0844980ebb5f287f614f35a398d596f135cb66abc73cb2f5558f4e16853bf3f4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, indicative of a link farm or phishing attempt, with the primary URL being http://rapidpermitreviewhawaii.com/uploads/1/3/0/6/130603858/130603858.html#plantronics+backbeat+pro+5100+true+wireless+earbuds. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded links suggests an attempt to redirect users to potentially harmful content. No scripts were extracted, but the PDF structure itself is highly suspicious.

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://rapidpermitreviewhawaii.com/uploads/1/3/0/6/130603858/130603858.html#plantronics+backbeat+pro+5100+true+wireless+earbuds
    • http://crosstrack.org/uploads/1/3/0/5/130588773/9199efa706aebf.pdf
    • http://wildercorp.com/uploads/1/3/1/3/131398177/e2f2417aa81854a.pdf
    • http://nhrivals.com/uploads/1/3/1/3/131380397/kesovuxivun_fufikibomi_vejodezomif_ruzonixirula.pdf
    • http://nikkileeyoga.com/uploads/1/3/1/3/131383541/joxexobowi.pdf
    • http://matthewmediatools2-1.com/uploads/1/3/0/5/130590416/e8fce19f1e.pdf
    • http://debudgetheer.nl/uploads/1/3/0/5/130588617/48594a40ad.pdf
    • http://blissfuldeals.net/uploads/1/3/0/4/130477252/dedovosago.pdf
    • http://hexagraphflyrods.com/uploads/1/3/0/6/130621758/435740bb2.pdf
    • http://mail.captainpaulsdogs.com/uploads/1/3/0/6/130639607/8347401.pdf
    • http://desertwonderstore.com/uploads/1/3/0/6/130621119/metiberoditep.pdf
    • http://atlantamachineservice.com/uploads/1/3/0/7/130775979/f36b836.pdf
    • http://dualsportride.com/uploads/1/3/0/7/130776484/8498903.pdf
    • http://expander-ie.com/uploads/1/3/0/7/130740022/vurimeris.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_off00007d5f.bin
7be0500790dfbebc468c77631fc76bc72193783e47f803ee66375ce4d81011b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5F 8800 bytes

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