Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0dc3a8499e956d…

MALICIOUS

PDF

36.2 KB Created: 2020-04-03 15:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4f11a5d1136d29c2bfa1c0a6fbee5ce2 SHA-1: d94690e041b43cb939a077167307d62e16e6df3c SHA-256: 5e0dc3a8499e956d858c6bfe5c049ee57bb17058ad77a957c7ba54c42b1f901c
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains, indicating a potential link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external links suggests the document is designed to redirect users to potentially harmful content or phishing 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/1/3/0/7/130776416/130776416.html#ejemplos+de+sustantivos+adjetivos+y+verbos+en+una+oracion
    • http://tuknikgs.com/uploads/1/3/0/7/130739393/f8b13a7284.pdf
    • http://veganhomestead.com/uploads/1/3/1/1/131163977/39cb2e1d745a5.pdf
    • http://thrustlogistics.com/uploads/1/3/1/4/131437778/daxez.pdf
    • http://lalalandband.com/uploads/1/3/0/8/130874088/e0144517.pdf
    • http://dramatreeboutique.com/uploads/1/3/1/1/131163666/69118ffabd5ea.pdf
    • http://prime-labs.com/uploads/1/3/0/6/130639581/vevuj.pdf
    • http://blessingdesign.org/uploads/1/3/0/2/130287367/mekoviloxotu_forawo.pdf
    • http://davidcasillas.com/uploads/1/3/0/6/130603834/xivev.pdf
    • http://poleaween.com/uploads/1/3/0/5/130550937/mufotikimezuj.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_off00006490.bin
a8c7f804551fbeebaa399ea032c4473ecc612ab8a421608d949cf5bb6f4b99aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6490 8616 bytes

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