Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe01cfc875e8d3e…

MALICIOUS

PDF

43.7 KB Created: 2020-04-02 14:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0ae4d843968f578e93ad887d9b49a17d SHA-1: ae7f75148135bc9cf3e5555e65a049abf1cb2251 SHA-256: 7fe01cfc875e8d3e02bc22c50df39975cbd90d830b73c7cf9889523a870cff7f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also flagged this PDF as malicious with high confidence. The embedded document body text, though partially corrupted, contains a URL that is also listed among the extracted URLs. This suggests the document's primary purpose is to redirect users to external sites, likely for SEO spam or to host further 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://scrubs4work.com/uploads/1/3/0/8/130874388/130874388.html#el+principito+y+la+rosa+te+quiero
    • http://theresetpoint.com/uploads/1/3/0/4/130483477/bizikerexoze.pdf
    • http://oldmanmickstudios.com/uploads/1/3/0/5/130541346/2627736.pdf
    • http://positively-jewish.com/uploads/1/3/1/1/131164120/fajamomegisasapum.pdf
    • http://bossycatproductions.com/uploads/1/3/0/4/130435833/turegesu-tonuwa-solajopi.pdf
    • http://laudatemariam.com/uploads/1/3/0/2/130289779/a2e2af2d0.pdf
    • http://chiropractorglorieux.be/uploads/1/3/0/6/130604091/juzobabuxajido_zokivakevogelev.pdf
    • http://mattbu.net/uploads/1/3/0/4/130483368/3f0bb88e2fb657.pdf
    • http://gescare.net/uploads/1/3/0/5/130538836/zevur-vutikuxidiga-naweketazato-mapesoxodep.pdf
    • http://ukustax.net/uploads/1/3/1/3/131398419/zefejupozad-jopuf-wepagatixozafix-bapetidemax.pdf
    • http://arandy.net/uploads/1/3/0/8/130874474/saselosuxofiwege.pdf
    • http://sunnylanefarmaz.com/uploads/1/3/0/6/130620710/5f6d6.pdf
    • http://jellevandermarel.com/uploads/1/3/1/4/131406149/peviji-jefev-vifiwovu.pdf
    • http://alliancepropertypreservation.com/uploads/1/3/0/6/130604475/a5875f5765cd4.pdf
    • http://maridorcatering.com/uploads/1/3/1/3/131383319/ef103738b.pdf
    • http://oakmonthistory.com/uploads/1/3/0/2/130271058/8468198.pdf
    • http://chicagolive.nm.org/uploads/1/3/0/6/130639651/627cc2e1.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076c0.bin
32209a03d232185da4a913e37bb5794edcc2c325128d2904d3da8f7fd76169c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x76C0 8684 bytes
font_01_sfnt_off00009637.bin
ccdb513f9f9b997ab503fae1484a3e920b4b4fc659fa9bd94a418ce32750de73
pdf-font-stream PDF embedded font (sfnt) at offset 0x9637 2600 bytes