Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cffee595187d4bf…

MALICIOUS

PDF

30.5 KB Created: 2020-06-11 15:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 712901554ec4f497a937487a1ac37538 SHA-1: 04655685ecd531b0f455f4a450f87b0534ed3af5 SHA-256: 6cffee595187d4bf95f0f10fbc0863c00e4f690584eaa07c8ae64099ee426bc9
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The document body, though partially corrupted, indicates a lure related to a 'Ford Fiesta owners manual 2015'. The presence of embedded URLs and the ML classifier's high confidence score strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://studiocantono.it/uploads/1/3/0/5/130551962/130551962.html#ford+fiesta+owners+manual+2015
    • http://myceavco.com/uploads/1/3/0/6/130604949/suzitowuzitazixoj.pdf
    • http://apartmrome.com/uploads/1/3/1/4/131413550/nebojidiw.pdf
    • http://peterjohntripodi.com/uploads/1/3/0/7/130739883/maxaxunazub.pdf
    • http://cassandra-key.com/uploads/1/3/1/4/131483245/debojatevuwu_namabanemikafi_sirolow.pdf
    • http://westcoastacademy.net/uploads/1/3/0/8/130813546/b2edc1a4d36b.pdf
    • http://profeward.com/uploads/1/3/0/6/130640125/4bfc285a080b8.pdf
    • http://firsthandsuccess.com/uploads/1/3/0/6/130604748/c4b71d54b41.pdf
    • http://filipdanielsson.com/uploads/1/3/0/5/130588290/vizamulasudalufun.pdf
    • http://wolfecityhomecoming.com/uploads/1/3/0/3/130379049/vigira.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://mesijug478181659.files.wordpress.com/2020/06/razexarifusod.pdf
    • https://rofutojotup.files.wordpress.com/2020/06/2910442568.pdf
    • https://negoxojes.files.wordpress.com/2020/06/61374324062.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005107.bin
8878a3d5da86b8ba2f53ef1004a9816249dfe39603f69dfee25068776d395307		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5107 8748 bytes

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