Malicious PDF — malware analysis report

Static analysis result for SHA-256 6096b34c09c992a1…

MALICIOUS

PDF

41.0 KB Created: 2020-03-21 02:17:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 32edc2434cba3c0fdf1b0a1a47be6a4f SHA-1: 13303dbd7bc053a0b801a2362938b1babdc36d7c SHA-256: 6096b34c09c992a18bd1145aea4640d438a29a731daf1bba40c7d12b453534d8
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a potential for redirecting users to malicious 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://the-whole-thing.com/uploads/1/3/0/4/130435982/130435982.html#metodologia+cuantitativa+y+cualitativa+pdf
    • http://ventur-ng.com/uploads/1/3/0/6/130620240/9372535.pdf
    • http://imaginecare.net/uploads/1/3/0/8/130813887/1780640.pdf
    • http://overthetoprentals.com/uploads/1/3/0/2/130291485/3a659.pdf
    • http://gonggallery.com/uploads/1/3/0/5/130589238/0070a06.pdf
    • http://www.ixtusins.com/uploads/1/3/0/8/130874521/5726059.pdf
    • http://mountainwomon.com/uploads/1/3/0/8/130813618/risuxamera_ferenoni_jogodalufora_ruwesoguwemez.pdf
    • http://pathpublications.com/uploads/1/3/0/5/130539936/c957e96.pdf
    • http://tigerlilykidsstore.com/uploads/1/3/0/4/130476751/854fe.pdf
    • http://www.shopscarletgypsies.com/uploads/1/3/0/6/130604651/fovuvawemovo.pdf
    • http://littlecorner.shop/uploads/1/3/0/4/130476766/xanitilogebo.pdf
    • http://kimbery-barrett.com/uploads/1/3/0/5/130539165/fasuxobotuk_ribuxewetamum_tupix_pekifenitinare.pdf
    • http://realtyprophotos.com/uploads/1/3/0/7/130738716/ponopikavopamazevejo.pdf
    • http://wallartifact.com/uploads/1/3/1/0/131070306/zesosasoboxef.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_off000076f2.bin
7858c6cc8b890a91ba0458a98c81f3d16dd1eced2e9b91bc435bc4a55012907f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F2 8756 bytes

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