Malicious PDF — malware analysis report

Static analysis result for SHA-256 44cfbcd331530186…

MALICIOUS

PDF

40.1 KB Created: 2020-05-14 11:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1a243040ce9f36c925959da01455118e SHA-1: dd108a326a5601b6fe41b10d17e8c42cae2a92b9 SHA-256: 44cfbcd331530186588dc77b5a6f921decc89347efb31cd1d2fac7d8b8a92bbf
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are numerically or generically named PDFs hosted on various domains, indicative of a link farm or SEO poisoning attack. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users seeking browser optimization. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to potentially malicious content via these numerous external links.

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://kpseasoning.com/uploads/1/3/0/4/130435500/130435500.html#browser+android+terbaik+untuk++video
    • http://mckenziebible.com/uploads/1/3/1/3/131379987/wulowexiregozopenuf.pdf
    • http://halenkooper.org/uploads/1/3/0/5/130540065/d5b9cad56a5325.pdf
    • http://capextri.com/uploads/1/3/1/3/131378993/petarepevafor.pdf
    • http://americasautoadvice.com/uploads/1/3/1/3/131380531/1189365ce9946.pdf
    • http://gildercollegeconsulting.org/uploads/1/3/1/4/131454526/tumuresog_tidipupukuv_dakuxofev_fulolidirozifok.pdf
    • http://honeyheavenbees.com/uploads/1/3/1/1/131164156/01e715220faa04.pdf
    • http://mecklenburgdrugcrimes.com/uploads/1/3/0/6/130639648/653405.pdf
    • http://giagotham.vip/uploads/1/3/0/5/130589151/c7903672.pdf
    • http://franmick.com/uploads/1/3/0/7/130738821/af8409f29dfb.pdf
    • http://svalc.org/uploads/1/3/1/1/131163494/wibobuxegubogabiriku.pdf
    • http://mormorsgucci.com/uploads/1/3/0/2/130287934/jewuta_vepunenovoxuvax.pdf
    • http://mcafeeanticrime.com/uploads/1/3/1/4/131453230/jodeluxe.pdf
    • http://capextri.com/uploads/1/3/1/3/131378993/petarepevafor.p
    • 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_off00007153.bin
e84a6c4c620dfd3f0c8ed262f2841e28e6a8a236cebccd75163d403eb583bce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7153 10444 bytes

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