Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb461b933a1cf5c…

MALICIOUS

PDF

29.6 KB Created: 2020-03-14 16:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a640f3a33fa286afc0e78010ab8119e7 SHA-1: 545f35f5212204ccdc7921483113cc264fe6aee3 SHA-256: 1fb461b933a1cf5c053420a193d5500d6e32992740b1214effa11322cda6e5ad
92 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a technique often used to distribute malware or redirect users to phishing websites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm designed to obscure the true destination. The document body, though partially corrupted, contains the text 'Anatomy digestive system worksheet', suggesting a lure to entice users to click the embedded links.

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://74-123-75-218.mgwnet.com/uploads/1/3/0/4/130476921/130476921.html#anatomy+digestive+system+worksheet
    • http://raaseypi.com/uploads/1/3/0/7/130776070/9eafdf4af658.pdf
    • http://thesapphire.co/uploads/1/3/0/8/130814101/8759752.pdf
    • http://wealthtacos.com/uploads/1/3/0/7/130776222/dab72a4f583930.pdf
    • http://cfg-ecommerce.com/uploads/1/3/0/5/130550938/gununal-ruxafujo-jobededuxujunu.pdf
    • http://nazcamp.org/uploads/1/3/0/6/130604197/mukutubodawimel.pdf
    • http://mylifesreflections.com/uploads/1/3/0/5/130544110/jozudaxagisu.pdf
    • http://canadianbio.ca/uploads/1/3/0/6/130621579/6136929.pdf
    • http://called2mission.com/uploads/1/3/0/7/130738893/tubolesemuza.pdf
    • http://bingscatering.net/uploads/1/3/0/5/130590564/67a34bf07.pdf
    • http://daydreamhairandmore.com/uploads/1/3/0/2/130287284/xedemep_dupele_pozoxob.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_off00004d85.bin
80bcdc3c31baba16fe7b31549b7be05c293b714301cc297729ba7986907fd3ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D85 7100 bytes

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