Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b2f92a988f4fb7…

MALICIOUS

PDF

45.7 KB Created: 2020-04-13 07:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b8f7e7e3584372470673822ae4ae5dbf SHA-1: aa233ea35a8400ea49be3317a178d2ab86c92852 SHA-256: 52b2f92a988f4fb75032a49525f0a57e45e9a8ee22d9a5b2fe46122e27fb2486
92 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are numerically or generically named and hosted on unrelated domains, indicating a link farm or SEO spam tactic. The document body, though partially corrupted, contains references to 'Arduino projects for beginners book' and URLs pointing to similar content, suggesting a lure to drive traffic to these sites. No scripts were extracted, but the heuristic firings strongly indicate malicious intent through link manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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
  • 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://stopeurocide.com/uploads/1/3/0/3/130313319/130313319.html#arduino+projects+for+beginners+book
    • http://pinkhibiscusvintage.com/uploads/1/3/0/2/130274024/6082258.pdf
    • http://selfdrivingcarwrecklawyer.com/uploads/1/3/1/0/131071056/sepubi.pdf
    • http://pratt.engineer/uploads/1/3/0/4/130483256/belipodizu.pdf
    • http://firstbookonline.net/uploads/1/3/1/4/131437693/bigagimor.pdf
    • http://pitchpowerandtrim.com/uploads/1/3/1/4/131408252/demojisivew_fokifitofika.pdf
    • http://9knotsgroup.com/uploads/1/3/1/3/131383943/bimop_zisebitopixala_lipewenafusani.pdf
    • http://greenpowersolutionsusa.com/uploads/1/3/0/6/130639662/kudulagebesuten_nivagibalog_tazawagunafi.pdf
    • http://towingserviceaurora.com/uploads/1/3/0/6/130639976/ac1bbd8999fd.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_off00007cd3.bin
6c5c9d7b71d47726043674ecdac9106047e687ea26d5a1d452e6da56dde2657b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD3 8896 bytes
font_01_sfnt_off00009ec9.bin
caff64d61b366a4ba6769ffe98f5ae0180232d321d47a7c95b08bb6810dafddf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC9 2860 bytes

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