Malicious PDF — malware analysis report

Static analysis result for SHA-256 26742482d5225b99…

MALICIOUS

PDF

42.4 KB Created: 2020-05-27 21:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c15793472b6751ca3546a56a396fe7d3 SHA-1: 22bbd10caa1d273ae7e9dc55101791ffefd6d794 SHA-256: 26742482d5225b999b207ff58060ef7c2b54a60ade11619caab47aa5f21a8774
92 Risk Score

Malware Insights

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

The PDF document is identified as malicious by an ML classifier and contains a large number of external links, many of which point to PDF files on unrelated domains. This behavior is characteristic of SEO link farms or content distribution networks used to host malicious payloads. The document body, though partially corrupted, suggests a lure related to 'Holt biology meiosis worksheet answers'. The primary attack pattern involves directing users to a network of potentially compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 3

  • 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
  • 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://elliemaeslapine.com/uploads/1/3/0/7/130740211/130740211.html#holt+biology+meiosis+worksheet+answers
    • http://ashtoninsuranceagents.com/uploads/1/3/1/1/131163960/2ea4551a44a.pdf
    • http://jlstreetfood.com/uploads/1/3/1/4/131454317/sowewosadotejaz.pdf
    • http://puravidadoula.com/uploads/1/3/0/7/130776564/tefavawipexade-jotot-dobutuxipi.pdf
    • http://antivirus.manoaschool.com/uploads/1/3/1/8/131856451/gurar.pdf
    • http://lorenzocaceres.com/uploads/1/3/0/6/130639950/zuligudef.pdf
    • http://lightcodesmusic.com/uploads/1/3/0/3/130313590/2109028.pdf
    • http://icaruscannabis.com/uploads/1/3/0/5/130589431/noretojebutak_mutiwalefen.pdf
    • http://potusshield.org/uploads/1/3/0/2/130287915/wesetuxaxutujekuz.pdf
    • http://traferolearning.com/uploads/1/3/0/4/130483393/zixazufujunalel-vibud-xotagarul-zinulavituli.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_off000077fe.bin
d5cb886f479e7532725cf62d1882f3263c18363076eea3377ede2c00f63bd980		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FE 11320 bytes

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