Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f893bbc43b054f…

MALICIOUS

PDF

72.9 KB Created: 2020-04-16 04:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1024fce3935f5f2c9d5f34d29676a9a6 SHA-1: 9b2bc4def3270ff4d6413f023dbedde8251a6429 SHA-256: 63f893bbc43b054fe446d4bb8ef9f6e3b460bf5c878df5d75f9abff33bb33325
96 Risk Score

Malware Insights

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

The PDF contains numerous external links disguised as a geotechnical report, a common lure for phishing or malware delivery. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of a link farm designed to redirect users to potentially harmful content. No scripts were extracted, but the structure suggests a malicious document intended to drive traffic to external sites.

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://bloodblisterapparel.com/uploads/1/3/0/6/130621530/130621530.html#geotechnical+report+contents
    • http://myregionals.com/uploads/1/3/0/4/130489423/59c25.pdf
    • http://tennfass.com/uploads/1/3/0/5/130589121/pazar_nipavaboragifon.pdf
    • http://thehistorichartingtonhotel.com/uploads/1/3/0/7/130775682/zazola_vusene_bibewejuba.pdf
    • http://adoptaloscabos.com/uploads/1/3/0/4/130436058/mowupufasagifon.pdf
    • http://iqsystemics.com/uploads/1/3/1/6/131637723/ronujujuwuk_vogurovavefido_mesiwutisiwu.pdf
    • http://violetscape.com/uploads/1/3/0/5/130588503/3806840.pdf
    • http://mtmviprecordingstudio.com/uploads/1/3/0/7/130739463/sogova.pdf
    • http://kentditmoreconstruction.com/uploads/1/3/0/8/130813132/semorurawilixenipubi.pdf
    • http://vegasedge.com/uploads/1/3/0/3/130323146/3774149.pdf
    • http://krackerjackskennel.com/uploads/1/3/0/2/130271113/6046643a7be2ac4.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_off0000f7e0.bin
602da22a96ed980f3bac7628b2bf9d985c94abad405c2a115f7b042bc619c544		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E0 8248 bytes

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