Malicious PDF — malware analysis report

Static analysis result for SHA-256 c855168ea3261c24…

MALICIOUS

PDF

39.9 KB Created: 2020-03-20 06:25:15 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 048e230ad9ca48202d4725cfe3ec448b SHA-1: ebf90726bc799dd9dbfe9b5fbab884bd8193890f SHA-256: c855168ea3261c240636e3d7b409b93df237928b13ebb7c6e4fcccaec48d5e1c
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, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs and potentially lures related to product specifications, which are likely part of a broader phishing or scam campaign. No scripts were extracted from this sample.

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://northernrailleaders.com/uploads/1/3/0/7/130738903/130738903.html#garmin+nuvi+57lm+specifications
    • http://thatlibertarian.com/uploads/1/3/0/5/130539255/8818502.pdf
    • http://cams-collection.com/uploads/1/3/0/6/130621283/dirafidevona_tibetajuk_guzuwinowobe_jironogirenod.pdf
    • http://aikotanaka.com/uploads/1/3/0/7/130740077/4260768.pdf
    • http://www.davidheydenrych.com/uploads/1/3/0/7/130738975/8076131.pdf
    • http://hopeccidaho.org/uploads/1/3/0/3/130313004/dadanile.pdf
    • http://bydtravelstours.com/uploads/1/3/0/8/130814784/lorujeseroba-wavivuwefu.pdf
    • http://jongpancingbetta.com/uploads/1/3/0/7/130739450/fuvawez_nemove.pdf
    • http://countrysidecreation.org/uploads/1/3/1/0/131070526/5582276.pdf
    • http://haysfarms.net/uploads/1/3/0/3/130379252/kaxotuj-xufadiko.pdf
    • http://homecareplus.info/uploads/1/3/1/0/131069992/zojituzowumogogi.pdf
    • http://www.scicomm.co.nz/uploads/1/3/0/5/130550997/bupuriganab-xutebur.pdf
    • http://babywhoopsie.com/uploads/1/3/0/2/130288522/tarujotebami.pdf
    • http://summercollege4kids.org/uploads/1/3/0/6/130639786/6bdc6388.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_off00007048.bin
095533fabe70fb92706f1fc21423ef6bd20dc4e9e5c729eed259777746688893		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7048 8684 bytes

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