Malicious PDF — malware analysis report

Static analysis result for SHA-256 517475864c4b1082…

MALICIOUS

PDF

28.9 KB Created: 2020-04-14 17:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d99371fa857fce8989e89bbc82c0b751 SHA-1: 0668cb0c4d24ffed99b4190197725e4ddcf4ce36 SHA-256: 517475864c4b1082950bb4671572079297c05c3395941fd616980802f75826ca
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged as malicious by an ML classifier. It contains a large number of external links pointing to various domains, many of which appear to be part of a link farm or SEO manipulation scheme. The primary attack pattern involves redirecting users to these external sites, which could host further malicious content or phishing pages. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://bodyonfleek.org/uploads/1/3/0/5/130539316/130539316.html#jax+guide+runes+s8
    • http://testintern-maechlermacht.services/uploads/1/3/0/6/130604667/7410710.pdf
    • http://sharoncraryhandwovenrugstapestry.com/uploads/1/3/0/8/130874368/2203392.pdf
    • http://carinabianca.com/uploads/1/3/0/2/130289242/3f71ce4a9e3272c.pdf
    • http://agelabeauty.com/uploads/1/3/0/4/130435877/995110.pdf
    • http://kbfineart.com/uploads/1/3/0/5/130546971/9879061.pdf
    • http://ricksportraits.net/uploads/1/3/0/6/130639841/sabuvadilumesenivadi.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_off0000500f.bin
d28b934f9a2f87befe0f8c338b34367d4483db83e11aa65e6b6ebc0ed174c27e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x500F 6052 bytes

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