Malicious PDF — malware analysis report

Static analysis result for SHA-256 92aa937ff2ef6860…

MALICIOUS

PDF

35.4 KB Created: 2020-06-02 21:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: d1f76664fa5bc2ebd45d5bb9cc840dbf SHA-1: 151c80a4a073a2f97d1f130580dd7db7ed66941d SHA-256: 92aa937ff2ef68606ff7efd67030e33ee9f4e365f24215d998becd93cf7c5c0d
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a 'PDF_SEO_LINK_FARM', suggesting a tactic to drive traffic to potentially malicious or deceptive websites. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or content-luring scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://4nk.undesirable.us/uploads/1/3/0/7/130776267/130776267.html#big+fernand+bastille PDF link annotation
    • http://nononsensecleaning.net/uploads/1/3/0/6/130639867/3758850.pdfIn PDF document text
    • http://romanceassistantevent.com/uploads/1/3/0/6/130620840/c2697.pdfIn PDF document text
    • http://trumanssociology.com/uploads/1/3/0/5/130588513/9729841.pdfIn PDF document text
    • http://4nk.undesirable.us/uploads/1/3/0/7/130776267/terms.htmlIn PDF document text
    • http://4nk.undesirable.us/uploads/1/3/0/7/130776267/dmca.htmlIn PDF document text
    • http://4nk.undesirable.us/uploads/1/3/0/7/130776267/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kigedor.files.wordpress.com/2020/05/24718057921.pdfIn PDF document text
    • https://taguvef.files.wordpress.com/2020/05/biravadu.pdfIn PDF document text
    • https://rezitofu.files.wordpress.com/2020/05/44242558688.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5739 14320 bytes
SHA-256: 545f4aaf0d9ea0b58c9293fd06af877093af243825e05ea4a44d035f1af32df6

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