Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf9e8a22daeb746…

MALICIOUS

PDF

54.6 KB Created: 2020-03-31 20:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 7b5f30db7ce2c7b1f1d0643f0bbd0db4 SHA-1: a524f41d546d1b5ae7d4a909194a26bbc38aa275 SHA-256: 7bf9e8a22daeb7466bf2f20beeddcf4dd8842e5b78ecc0f49b72ac169686841c
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links pointing to various domains, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, contains references to these URLs. This suggests the primary purpose is to drive traffic to these external resources, potentially for SEO manipulation or to serve as a distribution point for further malicious content. No scripts were extracted, but the extensive linking pattern is highly suspicious.

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/1/3/0/2/130274378/130274378.html#cual+es+la+importancia+de+la+argumentacion+en+un+texto PDF link annotation
    • http://faircareservices.com/uploads/1/3/0/7/130775653/2517713.pdfIn PDF document text
    • http://kyokushinkanaustralia.com/uploads/1/3/0/6/130604112/e87bbd06e937.pdfIn PDF document text
    • http://natru.net/uploads/1/3/0/7/130740151/a302a959a591.pdfIn PDF document text
    • http://pinehill-in-the-catskills.com/uploads/1/3/1/3/131382590/9812480.pdfIn PDF document text
    • http://mail.comeandseefbc.org/uploads/1/3/0/7/130739146/5c7e989ef.pdfIn PDF document text
    • http://gppasco.com/uploads/1/3/0/5/130588729/dorabuzibe_jiperedal_wolupuj_wapesofexizu.pdfIn PDF document text
    • http://humbertoveloso.com/uploads/1/3/1/4/131437766/4602070.pdfIn PDF document text
    • http://robmalo.com/uploads/1/3/0/6/130604671/edc603.pdfIn PDF document text
    • http://mamas-moment.com/uploads/1/3/0/8/130874076/4849877.pdfIn PDF document text
    • http://smplife.biz/uploads/1/3/0/6/130621076/35ded7b6a5f.pdfIn PDF document text
    • http://lotuseyez.org/uploads/1/3/0/4/130488604/degowig.pdfIn PDF document text
    • http://ejoevaultservices.org/uploads/1/3/0/9/130969671/mudawa.pdfIn PDF document text
    • http://wyngoldpark.com/uploads/1/3/0/3/130313241/tuzudije.pdfIn PDF document text
    • http://mysilentpartners.net/uploads/1/3/0/5/130550867/zejen.pdfIn PDF document text
    • http://melissasiciliano.com/uploads/1/3/0/2/130289262/9623256.pdfIn PDF document text
    • http://rasooldiaz.com/uploads/1/3/0/4/130476180/gomivijotip-peworuzu.pdfIn PDF document text
    • http://providence-title.com/uploads/1/3/0/6/130639629/4093040.pdfIn PDF document text
    • http://thegloryzonewc.com/uploads/1/3/0/4/130483848/e80872cc.pdfIn PDF document text
    • http://marig.se/uploads/1/3/0/5/130589322/3c60b6.pdfIn PDF document text
    • http://ourserenityhouse.net/uploads/1/3/0/6/130621120/42020b60.pdfIn PDF document text
    • http://namuco.net/uploads/1/3/0/8/130814729/7da4ce0b0.pdfIn PDF document text
    • http://regencyhotelhumbletx.com/uploads/1/3/0/6/130640074/fukesugod_xoxane_kirogisu_durezerazuraw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9730 8092 bytes
SHA-256: f4c18a258b192e9d456315ef8931c1f26c557eb489a823a833f4d3b87896582b
font_01_sfnt_off0000b4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E6 16060 bytes
SHA-256: f19dc41d490b60033b52f2fdde74623f1ba9924597607807c173cf149651756c

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