Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dfe1cbe1efcf6d4…

MALICIOUS

PDF

43.0 KB Created: 2020-03-24 16:13:45 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 93af1517759b75a024b2bbaec275faba SHA-1: ccb6923691bd987858c1c5718f7d1f2f1d309c92 SHA-256: 0dfe1cbe1efcf6d4017b61f8dc0c72e38e94e7cb8241513ee050b6cb0e93acc2
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on unrelated domains, suggesting a link farm or SEO spam tactic. The primary URL found in the document body, http://thehlifeonline.com/uploads/1/3/0/3/130323213/130323213.html#online+focus+group+definition+marketing, is likely part of this scheme. The ML classifier strongly indicated maliciousness, supporting the interpretation of this document as a lure.

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://thehlifeonline.com/uploads/1/3/0/3/130323213/130323213.html#online+focus+group+definition+marketing
    • http://woodridgeorthodontics.com/uploads/1/3/0/9/130969535/nivanala.pdf
    • http://preranaboutique.com/uploads/1/3/0/2/130289521/domega_varekamirub.pdf
    • http://cameronolds.com/uploads/1/3/0/2/130288439/xitaponev.pdf
    • http://neroliltd.com/uploads/1/3/0/6/130622038/1c1108.pdf
    • http://betteryouatwork.com/uploads/1/3/0/8/130813835/9497988.pdf
    • http://www.attythomasmcgarry.com/uploads/1/3/0/9/130969603/pitefibovazum-tizodebezuba-retexubixi-mikugukolo.pdf
    • http://lgcy-brand.com/uploads/1/3/0/5/130540937/5914215.pdf
    • http://cpanel.facemadics.com/uploads/1/3/0/7/130775053/bibakikizijime.pdf
    • http://texas1stirrigation.com/uploads/1/3/0/2/130287808/8870905.pdf
    • http://darthski.com/uploads/1/3/0/6/130603931/sojabegukeseriwujalo.pdf
    • http://admin.paramountbuilders.co.uk/uploads/1/3/0/5/130590217/2155506.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_off00008090.bin
7e1bb15ad6195e094055cf979f3a09156fc34ce7798d15ba9f6473bafa29f92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8090 7896 bytes

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