Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c8e03036563ea04…

MALICIOUS

PDF

38.2 KB Created: 2020-04-28 13:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d471b5440f101e776a926370676ae531 SHA-1: abe3f3d74211fde3abdd21b6b373a4fa691d829a SHA-256: 6c8e03036563ea04b6427928e65769f70b1b135077ef39ec9d847ca9984ec57e
96 Risk Score

Malware Insights

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

The PDF document is flagged as malicious by an ML classifier and contains a large number of external links, suggesting a link farm or SEO abuse tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure indicate potential for malicious redirection or content delivery. The document's apparent purpose is to disguise malicious activity behind a seemingly innocuous user manual.

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://arlotrainor.com/uploads/1/3/0/6/130604933/130604933.html#bmw+320i+2008+user+manual
    • http://anneaslin.com/uploads/1/3/0/5/130590671/vorozud_lutorizamus_gavozulipabidel_wuxuraxefux.pdf
    • http://greeremrllc.net/uploads/1/3/1/6/131606231/5073881.pdf
    • http://aloehealth-fit.com/uploads/1/3/1/4/131454397/wejimiw-pibotulifaka.pdf
    • http://blueheronscientific.net/uploads/1/3/0/5/130545173/4ddea0b170.pdf
    • http://ameliaislandgiftshop.com/uploads/1/3/0/6/130621909/7708470.pdf
    • http://bostonbabywearers.org/uploads/1/3/0/8/130815192/kifetoniwok.pdf
    • http://petropoint.net/uploads/1/3/0/4/130476104/peteledis_dibefofo.pdf
    • http://anthraciteatv.com/uploads/1/3/0/8/130874141/4608993.pdf
    • http://thelonelydab.com/uploads/1/3/1/1/131163747/2215784.pdf
    • http://upclosestand.com/uploads/1/3/0/3/130379081/midudetaba_xefadiregewe_sugufizovep_faleropubim.pdf
    • http://erinclinedavis.com/uploads/1/3/0/2/130287278/5586242.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_off00006c61.bin
0c025f32a2e60750cd3ff432aad7a844ab427abc8e0d0e4c4660e4a82e132519		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C61 8336 bytes

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