Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6fc14045cb08c0b…

MALICIOUS

PDF

50.9 KB Created: 2020-04-16 00:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 177ec6aacb9c9e77ec5475ea726ef3dc SHA-1: 9a0d48e6f0c3391807b30a754b114ac9a7fe864c SHA-256: f6fc14045cb08c0b0e0076065043ac51a906cbf60f9a990e96a46e1f5fe95079
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on various domains. The document body explicitly mentions 'Telecharger gta san andreas aptoide apk', indicating a lure for software download. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm designed to distribute potentially unwanted or harmful software.

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://richkane.biz/uploads/1/3/0/7/130775951/130775951.html#telecharger+gta+san+andreas+aptoide+apk
    • http://jinty.online/uploads/1/3/1/4/131438604/wimegojasas.pdf
    • http://niagaraadvantage.ca/uploads/1/3/0/5/130540116/mosunuvewi.pdf
    • http://autodiscover.craigfitchettdesign.co.nz/uploads/1/3/1/4/131437396/814821.pdf
    • http://freedommountainfestival.com/uploads/1/3/0/4/130476844/e0693d.pdf
    • http://gametosuccess.com/uploads/1/3/0/6/130639417/metiwinakajogir_sedita_sotefo_losogejewi.pdf
    • http://microsaninfocell.com/uploads/1/3/1/3/131381066/2790910b3f04c6.pdf
    • http://jwballiance.com/uploads/1/3/0/2/130289799/e3b20f13e7c.pdf
    • http://created2catapult.com/uploads/1/3/0/2/130272356/3348462.pdf
    • http://treyrobinsonphotography.com/uploads/1/3/0/4/130477448/marokovino.pdf
    • http://sunglomobile.net/uploads/1/3/0/5/130544240/2140975.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086b4.bin
df60eb49c9f7583a6e3ce1699319dfb900b20f86858cda1ad72e973d303648bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B4 11080 bytes
font_01_sfnt_off0000aa9c.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA9C 16036 bytes

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