Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f068a9462cb75e…

MALICIOUS

PDF

33.2 KB Created: 2020-04-06 08:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: db92783c1dca352b45fc5e42938f2ec0 SHA-1: 9c7aa575b20584589d959967e36e7e14f4e4f044 SHA-256: 34f068a9462cb75efccf10af7728969cd6057b29468df341dfcda7e47a26fca2
94 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to files with numeric or book-related slugs, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text that appears to be a title for an educational book, likely a lure to disguise the malicious intent of redirecting users to potentially harmful content hosted on various domains.

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://saegl.us/uploads/1/3/0/2/130270783/130270783.html#libro+de+ciencias+tercer+grado+telesecundaria+volumen+1+contestado
    • http://jarrodknight.com/uploads/1/3/0/6/130640199/dupiwu.pdf
    • http://laurierobertson.ca/uploads/1/3/0/5/130543052/3399319.pdf
    • http://agapechaplain.com/uploads/1/3/1/3/131382346/9792099.pdf
    • http://katrinaconnolly.com/uploads/1/3/0/7/130775772/miluveluziwetulo.pdf
    • http://no-spills.com/uploads/1/3/0/3/130324292/3812185.pdf
    • http://alphaartnframe.com/uploads/1/3/0/6/130639567/vobofatisegavof.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_off000056f1.bin
f403210fae8eb1541416488a2e1c6b3042d6486a5304acc6521009c7618617c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F1 8608 bytes

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