Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c754f0743e617cb…

MALICIOUS

PDF

43.7 KB Created: 2020-06-16 16:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9b17f0b64507f29b1954bb3c5a6929d SHA-1: 317d355b1b29ca8636b1fa14149846f1d1f2e619 SHA-256: 1c754f0743e617cbbb3d8830309bf096e8925e5bf916ecbfb67e151d058025f4
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, many pointing to domains that appear to be part of a link farm. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be a lure for an 'installer manual'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://sheaffermade.com/uploads/1/3/0/9/130969888/130969888.html#nx4+installer+manual
    • http://mail.massivemirror.ch/uploads/1/3/0/7/130740387/rufasawizar-rofipej-janetabofa-jijosupagejukun.pdf
    • http://hostmaster.mygreektragedy.com/uploads/1/3/0/5/130590186/2c73b0306.pdf
    • http://wright.business-facebook-covid19.com/uploads/1/3/1/4/131438324/1eb94974cce.pdf
    • http://tlrsouthafrica.com/uploads/1/3/0/6/130604782/gezofifebe-dumojusari.pdf
    • http://ivanastarcevic.com/uploads/1/3/1/6/131637016/soxakomozim.pdf
    • http://lexmorshipping.com/uploads/1/3/0/5/130590355/xopakonan.pdf
    • http://fiveofive.shop/uploads/1/3/1/4/131454603/3991904.pdf
    • http://airductcleaningdearborn.com/uploads/1/3/0/6/130621152/1723554.pdf
    • http://sophistable.com/uploads/1/3/1/3/131383646/lifozasaj.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_off00007f76.bin
d43c267ab961b3d1a5e386d44366b4c600b6357bc3f2147c9cb12b3ba39d8639		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F76 10912 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.