Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5dfd9e4c35c6e8…

MALICIOUS

PDF

42.9 KB Created: 2020-04-13 06:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e31313dd7fdb4f65cef93fc36fe7632a SHA-1: 1ccd0a9866e925eb729f34f20b5e2b358cbfaf0d SHA-256: 6a5dfd9e4c35c6e81f19e3ad6f92cf6ab13c00101aaf743b604c9dae733104ca
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 pointing to other PDF files, suggesting a link farm or redirection mechanism. The ML classifier strongly indicated maliciousness. The embedded URL http://armonkfire.com/uploads/1/3/0/7/130775241/130775241.html#modelo+humanista+en+la+educacion is likely part of this scheme to redirect users to malicious content.

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://armonkfire.com/uploads/1/3/0/7/130775241/130775241.html#modelo+humanista+en+la+educacion
    • http://amarakesh.com/uploads/1/3/1/4/131453433/1185022.pdf
    • http://accretioca.com/uploads/1/3/0/8/130874634/6731939.pdf
    • http://southerntastesweets.com/uploads/1/3/0/4/130483830/paxesazoxuru_vixisitujur_nataweta_zexujobafipijuf.pdf
    • http://vossboxaffaires.ca/uploads/1/3/0/7/130776103/dowoxepe_tupakefiza.pdf
    • http://masteringglam.com/uploads/1/3/0/6/130639547/8430f2f9c3e31a.pdf
    • http://losangelesdrivewayrepair.com/uploads/1/3/0/7/130775858/109e03b.pdf
    • http://omarloy.com/uploads/1/3/1/4/131438226/jesikinapilalajuput.pdf
    • http://nutmeg-labradoodles.com/uploads/1/3/0/5/130588533/newadafaw_bivurijumulu_lowiferuzoxe_tolubosagutu.pdf
    • http://bychancephotog.com/uploads/1/3/1/4/131437493/zuguw-vejelajakafawe.pdf
    • http://garagedoorrepairaustinnow.com/uploads/1/3/1/3/131380275/migamajelewo.pdf
    • http://artbodysoulstudios.com/uploads/1/3/1/3/131379034/950252.pdf
    • http://couplesignite.com/uploads/1/3/1/4/131406182/2d63b50e0415e.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006960.bin
f9a26a9a55943e5324846457cb5dc3dc0897c4a4521ab88ca0f465c5c6e3b6f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6960 8588 bytes
font_01_sfnt_off000088aa.bin
bb65e153df78154bfd14470754e87ba03df7715f8d52849d071c5334056f3476		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88AA 16096 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.