Malicious PDF — malware analysis report

Static analysis result for SHA-256 1740bfa31b516080…

MALICIOUS

PDF

33.7 KB Created: 2020-04-04 13:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: be97502cc03d27085e4655b19ea6ce5e SHA-1: a49ec042d9452a7941ebe7a6558f4a21d82054b4 SHA-256: 1740bfa31b51608083e640d3790104798143ef799d5811a8f2e12f7640f49ad6
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body also contains embedded URLs pointing to various domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of numerous external links indicates a potential for distributing further malicious content or driving traffic to malicious sites.

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://policetrailer.com/uploads/1/3/1/3/131379650/131379650.html#pictoword+classic+level+301
    • http://caringhandspetsitting.com/uploads/1/3/0/6/130622027/4937217.pdf
    • http://baldwinairconditioning.com/uploads/1/3/1/4/131437623/5949587.pdf
    • http://housebustersllc.com/uploads/1/3/0/7/130739578/b825781.pdf
    • http://eqdesignllc.com/uploads/1/3/1/3/131380932/pavegawopuv-madus-legefidos-gunakegepo.pdf
    • http://beverlyhillsjewelry.org/uploads/1/3/0/7/130739916/nekorananol_gatifagogon_divoj.pdf
    • http://oppiadesign.com/uploads/1/3/0/5/130543472/215802.pdf
    • http://bluevalleylops.com/uploads/1/3/0/3/130313090/genijot.pdf
    • http://csparling.com/uploads/1/3/0/7/130738784/jadodizusijupu_defadugetid_varavef_pekopawitifojaz.pdf
    • http://580774685565887697.com/uploads/1/3/0/5/130588554/juduge_zususekebira_tupipavuwuposu_sitiwoxapu.pdf
    • http://kidarisweets.com/uploads/1/3/0/7/130775222/gevefoza.pdf
    • http://theretrospectapparel.com/uploads/1/3/0/5/130550801/ecf0d7a756.pdf
    • http://hottubpartssweden.us/uploads/1/3/1/4/131413222/pedirumofananutalu.pdf
    • http://idahofreedomproject.com/uploads/1/3/1/3/131382126/b501e.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_off0000616b.bin
34eadf2dde2ccb2371c49192b936890e8f3f6605091da13e03894529f695d83d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616B 6124 bytes

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