Malicious PDF — malware analysis report

Static analysis result for SHA-256 6629aa60129bc533…

MALICIOUS

PDF

39.8 KB Created: 2020-04-03 06:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a12ade99cb961f6378cf35be6522f96a SHA-1: dc2da41f9ff7f5c656b958a34daedd9b9617cc65 SHA-256: 6629aa60129bc5335cc3e7c255a6713d8ba78cf7d4b3d490598c69925e28c934
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous links to unrelated domains supports this assessment. No scripts were extracted, but the document body and heuristics point to a link-farming or redirection attack.

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://pressurecleanit.com/uploads/1/3/1/4/131407112/131407112.html#far+away+in+american+sign+language
    • http://xtremexxlbullyz.com/uploads/1/3/0/8/130814402/2911317.pdf
    • http://noekat.com/uploads/1/3/0/6/130639445/pilimor_bukudufa_jizukezole_rutoj.pdf
    • http://pureheartstoreonline.org/uploads/1/3/0/6/130622005/rovuzapesunajarudage.pdf
    • http://orionpartners.us/uploads/1/3/1/3/131379815/6736770.pdf
    • http://bsmimpact.org/uploads/1/3/0/7/130739099/latixekumalas_vowetenawi.pdf
    • http://albertconstructioninc.com/uploads/1/3/0/6/130620882/5337915.pdf
    • http://mcl-consortium.org/uploads/1/3/0/3/130379461/d6b856.pdf
    • http://evo-hemp.com/uploads/1/3/1/0/131070284/0cb1acf.pdf
    • http://augellocontractors.com/uploads/1/3/0/7/130738512/dudone.pdf
    • http://wertsfamilyfarm.org/uploads/1/3/0/7/130776878/3360853.pdf
    • http://bridlewiseridingacademy.com/uploads/1/3/0/7/130775424/1584934.pdf
    • http://preciousdropyounglivingsabah.com/uploads/1/3/1/3/131381772/tejifi.pdf
    • http://caregiversedge.com/uploads/1/3/0/8/130814535/6222342.pdf
    • http://chancifulcreations.com/uploads/1/3/0/2/130271245/xegatipig-xonikuxamabo-nizup.pdf
    • http://golfbravobravo.com/uploads/1/3/0/3/130323510/vimuxerifaveriseluko.pdf
    • http://lifegrace.org/uploads/1/3/0/8/130874631/1186252.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_off0000735a.bin
d237d9447f1a7941a05c75661531fab7e372f16feb1b7f493e716cdd87ef3bca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735A 7840 bytes

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