Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea633839abba88c…

MALICIOUS

PDF

40.7 KB Created: 2020-04-01 15:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c1e9af749406bc30c26f244c8c92ace1 SHA-1: 57333285f57307af6f9b1ea0caa49c34d0b813ba SHA-256: 1ea633839abba88c94034ec569b9468569123bd1876dc25a1afa30dca361ef38
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to various domains, forming a link farm. The primary lure appears to be related to 'recrystallization', directing users to a page with further links to other PDF documents. This suggests a tactic to increase search engine ranking for malicious content or to distribute further payloads through a network of compromised websites.

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://moonshinemeadowsminifarm.com/uploads/1/3/1/3/131398597/131398597.html#how+to+do+recrystallization
    • http://legacytrustlife.com/uploads/1/3/0/6/130604703/5112718.pdf
    • http://eaconstructionandrepairs.com/uploads/1/3/0/4/130483271/daf90782.pdf
    • http://4strengthgym.com/uploads/1/3/0/6/130640095/8573527.pdf
    • http://peoplesmedicine.us/uploads/1/3/1/1/131164272/lajixijipopipalovem.pdf
    • http://traphippies.com/uploads/1/3/0/9/130969539/kevubonugomij.pdf
    • http://getcloakt.com/uploads/1/3/0/8/130874300/7552928.pdf
    • http://rockthedam.net/uploads/1/3/0/3/130379098/firizi_muvorotujaf.pdf
    • http://hostedpropertyservices.com/uploads/1/3/0/9/130969194/7122c4f0cf.pdf
    • http://limited-edition-bags.com/uploads/1/3/1/0/131071298/titutifogafetibiv.pdf
    • http://grindhousehardsoda.com/uploads/1/3/0/8/130813997/ragerub_tilopezu_gabeno.pdf
    • http://portwingmarket.com/uploads/1/3/1/4/131438161/1ea3a57.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_off00007819.bin
573cc5c9bf0a7ea4d8a180333d29f6dbc8a9ec73bd46fa0ce46978142be9a432		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7819 7204 bytes

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