Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe30d87d45320110…

MALICIOUS

PDF

39.6 KB Created: 2020-03-28 02:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3835c095e6ecc2e5b182d2e23898cd06 SHA-1: 74f39abcad69fd7fb400a950483c3b99ddf7ad38 SHA-256: fe30d87d45320110a728de16ae9be53bb40da95851dc022d4490ab9976646350
94 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to direct users to malicious content. The ML classifier strongly indicated maliciousness. The document body text is largely garbled but contains a URL that is also present in the heuristics and URL list.

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://smokin.tires/uploads/1/3/0/5/130547078/130547078.html#masaje+reductor+de+abdomen+paso+a+paso
    • http://www.karensnaturaltherapies.co.uk/uploads/1/3/0/8/130813988/midaxo.pdf
    • http://justinvogt.net/uploads/1/3/0/5/130588757/menag_mowenej_suzevusibekiji_mopeferufofo.pdf
    • http://www.oxyshooter.com/uploads/1/3/0/4/130490378/viwuxosiruvupixe.pdf
    • http://hasp-advies.nl/uploads/1/3/0/6/130621357/segapow.pdf
    • http://appbootcamp.com/uploads/1/3/0/8/130874317/reverimugad.pdf
    • http://experttranslationservices.com/uploads/1/3/0/6/130621369/7998235.pdf
    • http://canaryfilms.org/uploads/1/3/0/5/130542770/wegiramubez.pdf
    • http://drewkjones.com/uploads/1/3/0/2/130272241/nireluxasi.pdf
    • http://juicyrealm.com/uploads/1/3/0/4/130435725/ac8bb099b41.pdf
    • http://www.mhftampa.org/uploads/1/3/0/5/130590410/lewijekisiru.pdf
    • http://miamiautodeal.com/uploads/1/3/0/6/130621583/e1a6b19.pdf
    • http://natalieeldridge.com/uploads/1/3/0/6/130621203/3427685.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_off000072fa.bin
377da9c26363896d6bcf24a3371d533061203a03b1dbd3557eeb09d8356f0b43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FA 8324 bytes

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