Malicious PDF — malware analysis report

Static analysis result for SHA-256 596502165840d4ed…

MALICIOUS

PDF

39.2 KB Created: 2020-06-08 11:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 997e1b8d8112f0fc569e2d0011280e80 SHA-1: a328b623c49ac15cac8cd7afceee855b1dc7b3c9 SHA-256: 596502165840d4edad1f5f0401d14afb265de1142a7c3de26e3d084d468bc00b
92 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier. It contains a large number of external links, many pointing to PDF files with numeric or slug-based URLs, indicative of a link farm or SEO spamming operation. The primary external URI points to a .html file, suggesting a potential redirection or landing page. The document body contains garbled text and references to 'wkhtmltopdf', indicating it was likely generated programmatically.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://leysafaris.com/uploads/1/3/1/4/131406758/131406758.html#exercice+fonction+carr%25C3%25A9+seconde
    • http://bioser.net/uploads/1/3/0/5/130545194/pipidalufe-tedomimopev-famij-wuxupugevor.pdf
    • http://lanyuludao.com/uploads/1/3/1/0/131070851/701a0.pdf
    • http://405.undesirable.us/uploads/1/3/0/6/130621426/239c6e392f2e1b.pdf
    • http://weybridge10k.com/uploads/1/3/0/9/130969659/54ec2.pdf
    • http://trendterror.nl/uploads/1/3/1/3/131380745/9606396.pdf
    • http://asaerlandson.com/uploads/1/3/0/6/130605442/kobomefa.pdf
    • http://loja.robertotorao.com/uploads/1/3/0/7/130738555/nuzujat.pdf
    • http://offensivelygenerous.org/uploads/1/3/0/3/130323707/bonoseb_zegeses.pdf
    • http://murphysboonenc.com/uploads/1/3/0/4/130476830/mopumuge_botigod_gevivafalafiz_xarutoti.pdf
    • http://globallearninghub.org/uploads/1/3/1/4/131437229/4870096.pdf
    • http://gemeinsamwohnen.net/uploads/1/3/0/6/130621352/bijifipulakuket.pdf
    • http://fotowoltaikakoszalin.pl/uploads/1/3/1/8/131857565/nemito_jolotinab_vukuxewivin_teveloporubifub.pdf
    • https://gotonuxaxoxo.files.wordpress.com/2020/06/17894441447.pdf
    • https://wilopag.files.wordpress.com/2020/06/70312968241.pdf
    • https://sisakapajaw.files.wordpress.com/2020/06/subefivegarejinetizefus.pdf
    • https://fafigunik.files.wordpress.com/2020/06/jiwovo.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_off00006219.bin
ecdf345e43aecdd25ea4707b657673fbfd5cec6db910f7087fa82ee5b9b40e24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6219 14184 bytes

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