Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7dcdea5caa5ac9…

MALICIOUS

PDF

65.0 KB Created: 2020-03-25 07:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 66644511bd96bf76c8ad5d157b949bd1 SHA-1: 005501ce6397ad3910170a7e3e64f024377c37ba SHA-256: 3f7dcdea5caa5ac924424c293543aeba2477233501bc922625328492a35bb7ef
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The document body text, though partially corrupted, includes a reference to '1 tesalonicenses 2 18 explicacion', suggesting a lure to disguise the malicious intent. The embedded URLs point to various domains, indicating a link farm designed to distribute traffic and potentially evade detection.

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://sadiths.com/uploads/1/3/0/5/130546519/130546519.html#1+tesalonicenses+2+18+explicacion PDF link annotation
    • http://scihm.net/uploads/1/3/0/8/130813144/3978101.pdfIn PDF document text
    • http://drjonimd.com/uploads/1/3/0/4/130435998/mikawujozozina.pdfIn PDF document text
    • http://brazilstars.soccer/uploads/1/3/0/7/130738719/vefarulufokoki.pdfIn PDF document text
    • http://pbellamy.net/uploads/1/3/0/8/130813965/digalolimasoj.pdfIn PDF document text
    • http://wildwoodsmen.co.uk/uploads/1/3/0/4/130436410/jokigixodu-zumawe.pdfIn PDF document text
    • http://mixfruitonline.com/uploads/1/3/0/7/130739476/kukisisoxokalasa.pdfIn PDF document text
    • http://www.bayareacustodycoach.com/uploads/1/3/0/8/130874143/4752756.pdfIn PDF document text
    • http://lauranathanparty.com/uploads/1/3/0/3/130323182/xewova-noxotada-jivugele-gabopatu.pdfIn PDF document text
    • http://caitlinmorrison.com/uploads/1/3/0/3/130379522/bujewukumabis.pdfIn PDF document text
    • http://4lifemovement.org/uploads/1/3/0/4/130477026/8c752bb26165.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

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_off0000d692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD692 8404 bytes
SHA-256: 372e9c964aa249860f43005153c4a7c6bb50597c5f58912d4c36dce1a381d683

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