Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2e63786307c059…

MALICIOUS

PDF

50.0 KB Created: 2020-04-05 09:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 193bf855bab8df3393034d9c8e9b6a31 SHA-1: 72e7ce863ba66bcb6c32992b504cd31c3e10ff03 SHA-256: 6e2e63786307c0591adf5c636ae74386c997460e61c5b02d344f9480aa643425
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, many of which are structured as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The document body, though obfuscated, contains URLs that are also present in the heuristic findings, reinforcing the attack pattern. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious content or behavior.

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://friscocandlecompany.org/uploads/1/3/0/8/130874540/130874540.html#parasternal+long+axis+view+probe
    • http://typicalang.net/uploads/1/3/0/4/130436094/0867e.pdf
    • http://swkitchen.com/uploads/1/3/1/4/131438177/pibaporarulejomizum.pdf
    • http://sophievermeulen.com/uploads/1/3/0/3/130323479/5564867.pdf
    • http://knowledgeoftheword.net/uploads/1/3/0/4/130476102/6797847.pdf
    • http://wolfmoon.farm/uploads/1/3/0/4/130477146/40488b0f34829.pdf
    • http://themusicseo.com/uploads/1/3/0/6/130640024/sapetiku_disujafek.pdf
    • http://www.dio-training.com/uploads/1/3/0/4/130483540/wosizetuwilagil.pdf
    • http://comparehousebuyers.net/uploads/1/3/0/3/130313235/4994025.pdf
    • http://bevsandmacsleisuretravels.com/uploads/1/3/0/9/130969686/cbf44b.pdf
    • http://plcastudio.com/uploads/1/3/1/1/131163514/mitab.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_off00009995.bin
ae291f7952a7372649cdcf114a3e5b0268f8e663fe6146184a14604aef79ddea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9995 8332 bytes

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