Malicious PDF — malware analysis report

Static analysis result for SHA-256 59abbdad1ad6a001…

MALICIOUS

PDF

42.7 KB Created: 2020-03-11 03:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: ce101596be70bf8007be37bd5ff5c593 SHA-1: e5505129e9afb805c7db346e688cac625d514320 SHA-256: 59abbdad1ad6a001265d3c9047b8063c0bf661c29b4df6e3ef0ac57cf00b97cc
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 appear to be part of a link farm designed to direct users to potentially malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous unknown-reputation URLs supports this assessment. No scripts were extracted, but the document's structure and embedded links suggest a social engineering tactic to drive traffic to attacker-controlled 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://74-123-77-77.mgwnet.com/uploads/1/3/0/5/130550961/130550961.html#handbook+of+agriculture+icar+pdf+free PDF link annotation
    • http://makeyourmark.shop/uploads/1/3/0/2/130289504/vujekuzasuki-mibafabe-kujidog-senovox.pdfIn PDF document text
    • http://maximumautomation.com/uploads/1/3/0/5/130544754/lalizosutusupu-wagufimen-bakit.pdfIn PDF document text
    • http://www.burnoutsolutions.com.au/uploads/1/3/0/8/130873790/renedetafid.pdfIn PDF document text
    • http://capstonecenters.com/uploads/1/3/0/7/130738566/a94067dc.pdfIn PDF document text
    • http://www.henryli.org/uploads/1/3/0/7/130740456/xadimakixakeku.pdfIn PDF document text
    • http://officialrjmproductions.com/uploads/1/3/0/5/130588653/3100691.pdfIn PDF document text
    • http://primdiva.com/uploads/1/3/0/7/130775505/peduporu.pdfIn PDF document text
    • http://nusoulproductions.net/uploads/1/3/0/2/130270903/menoza.pdfIn PDF document text
    • http://ephinityessentials.com/uploads/1/3/0/9/130969384/2dbc64a553c.pdfIn PDF document text
    • http://pasturepride.com/uploads/1/3/0/2/130270855/5778504.pdfIn PDF document text
    • http://www.betterexecutive.org/uploads/1/3/0/7/130738527/d45fb29d.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6841 8228 bytes
SHA-256: f2d0c9fea84a2b8083d3e0e124db85eb8a76af6df91a761f164aeb33a372c642
font_01_sfnt_off000087ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87EC 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d