Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2dcd7984100bb0d…

MALICIOUS

PDF

43.3 KB Created: 2020-04-05 06:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 391e8bfe481a629eca504041ce9ba3d5 SHA-1: db81b490c22d3fc3e20739f6762f1b554ac6aac9 SHA-256: a2dcd7984100bb0d45977fdf13cc0ea8ee871d53282b2082ccf352139bf4fcdb
94 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, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body contains text related to 'Game of Thrones board game' and 'wkhtmltopdf', suggesting a lure to potentially malicious content hosted on the linked domains. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://designproinnovation.com/uploads/1/3/0/4/130478433/130478433.html#game+of+thrones+board+game+dance+with+dragons+strategy
    • http://upperperktennis.com/uploads/1/3/1/4/131409035/bajipazevi.pdf
    • http://alghnadeer.com/uploads/1/3/0/6/130621575/2435498.pdf
    • http://christinamarykow.com/uploads/1/3/0/8/130813616/9296149.pdf
    • http://digitalmarketingguru.org/uploads/1/3/0/6/130604498/4746853.pdf
    • http://1010pixel.com/uploads/1/3/0/3/130313564/1698367.pdf
    • http://jackbrucker.net/uploads/1/3/0/5/130551463/rureleze-ginemu.pdf
    • http://blastaxcapital.com/uploads/1/3/0/8/130813409/nexesikozewu.pdf
    • http://cookiesbycatherine.com/uploads/1/3/0/4/130483459/gafonegej.pdf
    • http://adamscofair.com/uploads/1/3/0/6/130639983/4445695.pdf
    • http://healthylivingforallages.net/uploads/1/3/0/2/130289317/ac1eac4a3d.pdf
    • http://mainstcollective.com/uploads/1/3/0/4/130483200/1460469.pdf
    • http://winchesterartmurals.com/uploads/1/3/0/7/130776388/pofifareravigap.pdf
    • http://owenhawthorne.com/uploads/1/3/0/7/130739070/b57ac0829985f.pdf
    • http://amhandyman.org/uploads/1/3/1/3/131381540/xotavejet_folugupe_wabuke.pdf
    • http://tiffin-fresheveryday.com/uploads/1/3/0/7/130775928/bdfafbd.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_off00008090.bin
732bffa13d8e2b758c6fc228841c70a67aeac1ff70bad208bea709c8c832fa95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8090 7928 bytes

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