Malicious PDF — malware analysis report

Static analysis result for SHA-256 943c25264d2b8434…

MALICIOUS

PDF

32.2 KB Created: 2020-05-20 03:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d80cbf2f1c1f4e211ebcaf6ab2f2773e SHA-1: 47d788057ce1ecd92cebb71b11d73cb017d6d65f SHA-256: 943c25264d2b8434c590d18426b0153c7f23c3ecdae750642b667a9c8b9e9994
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous external links, many of which point to domains that appear to be part of a link farm designed to host malicious content. The document body suggests a lure for "one love mp3 download", indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious attack pattern.

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://driveways-matter-gmail.com/uploads/1/3/1/4/131406062/131406062.html#one+love+mp3+download
    • http://charliemcmanus.com/uploads/1/3/0/6/130639583/1061273.pdf
    • http://haircognetix.com/uploads/1/3/0/7/130739778/7574262.pdf
    • http://husbunnyandwife.com/uploads/1/3/0/8/130873860/xewetipi.pdf
    • http://jiahuilin.com/uploads/1/3/0/4/130478057/nuwozewogi-kofezapivedobe.pdf
    • http://zoescopestudio.com/uploads/1/3/0/7/130739810/guzafo-vezizab-pumexuzimaj-jexozepupiz.pdf
    • http://highcountryav.com/uploads/1/3/0/5/130539265/25d57c1.pdf
    • http://questbusinesses.com/uploads/1/3/0/5/130540009/modofitixu.pdf
    • http://camelotpublishingco.net/uploads/1/3/0/5/130544136/tilajebape.pdf
    • http://pipyritinsure.com/uploads/1/3/1/4/131453871/duwix_doleduxamovav.pdf
    • http://tens2015.org/uploads/1/3/0/6/130639976/mejeraf.pdf
    • http://clgoods.com/uploads/1/3/0/8/130814083/2bcd1ac5909.pdf
    • http://deannaheathrealty.com/uploads/1/3/0/6/130604327/gewijisow.pdf
    • http://2500pellissierplace.com/uploads/1/3/0/7/130740163/5102135.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_off000051ca.bin
a299509e92a8ed3af81098a0ffd8ac5bffa1eb8de32638b97611503f1e54ae0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51CA 10552 bytes

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