Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fbeb67c8ed45d9d…

MALICIOUS

PDF

40.9 KB Created: 2020-04-07 06:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fce3aab79d54536f8bf5de9460b07625 SHA-1: 3b1bf47bf7f01a8cbf4641155b9815e051a62b1a SHA-256: 0fbeb67c8ed45d9d3ef030dd642092164d1ee26223a2425102ccede4779bcd46
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the sheer volume of external links and the ML detection point to a malicious intent, possibly to host malicious content or redirect users to phishing sites.

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://rebeccalaplacaattia.com/uploads/1/3/0/4/130435959/130435959.html#how+to+use+a+wildgame+innovations+trail+camera
    • http://lafabriquededessins.com/uploads/1/3/0/4/130476657/8cc2fa056a3351.pdf
    • http://dreamfreedesign.com/uploads/1/3/0/5/130588545/xokivilope.pdf
    • http://cameronayres.com/uploads/1/3/0/8/130814030/c48d5f4a983.pdf
    • http://wordoflifebaptistchurch.org/uploads/1/3/0/2/130287246/6d8f1107b5.pdf
    • http://worldtravelingislife.com/uploads/1/3/1/3/131378972/xafaziropogozefu.pdf
    • http://subterraneo.co/uploads/1/3/0/5/130589431/jajewob-gadukepoxejaf-povuxagurowariw-puzutider.pdf
    • http://bensplumbingandheating.com/uploads/1/3/0/8/130813835/8914367.pdf
    • http://kiddletbooks.com/uploads/1/3/0/4/130483479/togilubumefulob-vunozusuba-naladasorok-wilipotamuman.pdf
    • http://racheljemmett.com/uploads/1/3/0/5/130551106/6692019.pdf
    • http://hollowandhive.com/uploads/1/3/0/8/130874076/pobiralanudupu-tikexe-medizisad.pdf
    • http://centralcoastscienceproject.com/uploads/1/3/0/2/130289789/db301392.pdf
    • http://bonavistaart.com/uploads/1/3/1/3/131381693/1487477.pdf
    • http://battle4warriorz.org/uploads/1/3/0/4/130476974/kudaxojili.pdf
    • http://bedroomthirteen.com/uploads/1/3/1/0/131071111/wipik.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_off00007723.bin
f7370699ce8164ba64ab465533bf0ed3f91617090bda94c430299fbbc6c3e3b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7723 7996 bytes

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