Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8bd74f966f9ea7…

MALICIOUS

PDF

86.5 KB Created: 2020-04-22 17:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 50c2f832e1809ae15603fee55b3debae SHA-1: a5465e9f62d0b2ac9a76911cceeee68134032f71 SHA-256: 6e8bd74f966f9ea755d848b0b002b13b442411fd38f76e068e13f7a9a6a2ca09
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO abuse tactic. The ML classifier strongly indicated maliciousness. The embedded URLs are likely used to redirect users to malicious sites for further exploitation or phishing.

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://bishophollymission.org/uploads/1/3/1/4/131438604/131438604.html#another+story+mystic+messenger+email+guide
    • http://xcelxe.com/uploads/1/3/0/4/130488345/penenifowana.pdf
    • http://thistletransmission.com/uploads/1/3/0/3/130379466/toxekalevifip-pofikisumitod.pdf
    • http://peinturecreation.com/uploads/1/3/1/0/131070168/f5199f4b1.pdf
    • http://cinderella-moments.com/uploads/1/3/0/2/130289359/setewi_puxubevofegar_bazuxopagozewe.pdf
    • http://essentialmensclinic.com/uploads/1/3/0/4/130483499/bebalewo-xarom-losamutedigapas-defoxejinu.pdf
    • http://dreamlineconstruction.net/uploads/1/3/0/8/130814430/medame.pdf
    • http://spbuntingconsulting.com/uploads/1/3/1/0/131070152/kaselekogu-zozulixu-dofejubati.pdf
    • http://exorxist.com/uploads/1/3/0/8/130813787/mexovetobitofe_xodadanoter_sijekadomowupa_xizixofi.pdf
    • http://hartloansignings.com/uploads/1/3/0/5/130590217/443b951fe.pdf
    • http://heartbeatcoffee.com/uploads/1/3/0/5/130588280/wafuxazexedu_tujaxanisetatuj.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_off00012ad7.bin
cefb431695c6fa0e118838314809de3684d41218aded99794b9ac80deaf26f85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD7 8516 bytes

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