Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d4e754c6f088d9…

MALICIOUS

PDF

56.2 KB Created: 2020-04-02 08:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 00ef9c73260a3499e728a8adb19cab7f SHA-1: f815748a3371e2573093e4b15ba7e020ed59caed SHA-256: 55d4e754c6f088d9af2c6e42e2fa95e83f6b10168c3759ac5403949dd61db32e
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The primary lure appears to be a link to 'http://thewholesomekitchen.net/uploads/1/3/0/4/130483138/130483138.html#howl%27s+moving+castle+movie+ending'. This suggests a link farm or SEO manipulation tactic, potentially distributing malware or phishing content through the linked PDFs. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://thewholesomekitchen.net/uploads/1/3/0/4/130483138/130483138.html#howl%27s+moving+castle+movie+ending
    • http://floodhelplouisiana.com/uploads/1/3/0/9/130969654/5d8d5914b3.pdf
    • http://usiwatercraft.com/uploads/1/3/1/4/131437208/f7e259.pdf
    • http://gpswellbeing.com/uploads/1/3/0/2/130291623/duzuw-bukapitifezodu.pdf
    • http://starhealthclinic.net/uploads/1/3/0/3/130313320/ad5db4a3a13da.pdf
    • http://cascadia.life/uploads/1/3/0/3/130323538/2464231.pdf
    • http://oratheband.com/uploads/1/3/0/4/130488483/xemelipavovagubeduj.pdf
    • http://cccourierexpress.com/uploads/1/3/0/2/130289474/mibugi-navowefinevevod-linonem-zitawizudebazib.pdf
    • http://shuryukankarate.com/uploads/1/3/0/7/130738885/4810435.pdf
    • http://thebossladynetwork.net/uploads/1/3/0/8/130874655/zukifo.pdf
    • http://www.oroxflexo.com/uploads/1/3/1/4/131438397/pepibuzutubun_kefojuxa_duvinepagabiret.pdf
    • http://www.wasbc.net/uploads/1/3/0/4/130476389/3629604.pdf
    • http://annamariaphotographer.com/uploads/1/3/0/4/130476850/dabub-surowez-tavevepe-fejuwena.pdf
    • http://ncprepster.com/uploads/1/3/0/6/130639228/4572118.pdf
    • http://madszlime.com/uploads/1/3/0/5/130540458/b57660.pdf
    • http://heelingnow.net/uploads/1/3/0/5/130543980/1761141.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_off0000b3ff.bin
e02bd12d7cd6d7f46fdc6463cd5b181d04cb6e77b2313dca8020be6792fec2a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3FF 8084 bytes

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