Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1268b93868b7a8e…

MALICIOUS

PDF

33.9 KB Created: 2020-04-06 11:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 33939a0d231e29eecc8c0794044a6954 SHA-1: a76a361b80f91e8fa4d02b062a8d7d6454455165 SHA-256: f1268b93868b7a8e42ca190b07fbc294e5c5fb9f93aeb3ea67a7433a616077aa
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 are SEO-optimized and point to other PDF files. This pattern is indicative of a link farm designed to drive traffic or potentially host further malicious content. The ML classifier strongly supports the malicious verdict.

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://carpetcleancary.com/uploads/1/3/0/4/130436306/130436306.html#knights+of+columbus+4th+degree+new+regalia
    • http://stimulationsamenopweg.com/uploads/1/3/0/9/130969375/powovezuni.pdf
    • http://vintagehomedecoroldsaybrook.com/uploads/1/3/0/4/130476499/fulefusuvuzogoj_fonodebur_wigigu.pdf
    • http://vertigovaporium.com/uploads/1/3/0/5/130550858/5726475.pdf
    • http://thebohemianemporium.com/uploads/1/3/0/7/130740013/47b8bbe6e.pdf
    • http://ashopintheclouds.com/uploads/1/3/0/2/130271226/diworerirevo-kiwaxanizapifuv-bofeve.pdf
    • http://novoac.com/uploads/1/3/0/8/130813888/vunidipige-gamefamuso-fepibelo-nemepezedijis.pdf
    • http://alittlebitofcrazylife.com/uploads/1/3/0/7/130740175/lebivatogep.pdf
    • http://romanacoutureshop.com/uploads/1/3/0/7/130739150/vajesetizuja_pewisazaxamixem_sirilirobepo.pdf
    • http://sendsomehappymail.com/uploads/1/3/1/4/131406799/jetasanukixa_lepop_nigaxawuvis.pdf
    • http://yourinnerwellness.net/uploads/1/3/1/3/131383543/9974612.pdf
    • http://doggynosesandyogaposes.com/uploads/1/3/1/3/131380337/05340507a789c.pdf
    • http://smartchoiceagentswi.com/uploads/1/3/0/9/130969514/8d1c8.pdf
    • http://jeffziegenbein.com/uploads/1/3/0/6/130639107/5018031.pdf
    • http://fbbcback2school.com/uploads/1/3/1/4/131483685/79ff968561c84.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_off00005cca.bin
a821328ba79c8ef13863b816dbefd7de45691e10b5c1192e10506637020c536b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCA 7544 bytes

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