Malicious PDF — malware analysis report

Static analysis result for SHA-256 1318479ac7e06689…

MALICIOUS

PDF

51.7 KB Created: 2020-05-22 18:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a889552caf72cba406c6c5bbdcb8a2a SHA-1: b03617bb5a44f3fec7c995d9f9d0a4cb862e6c2d SHA-256: 1318479ac7e0668947bef6dba9046551fe0e355809706b104c624f1eb7948c3d
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 point to other PDF files, suggesting a link farm or redirection scheme. The embedded content, though partially obfuscated, includes URLs that are likely used to direct users to malicious or phishing sites. The ML classifier strongly indicated maliciousness, and the PDF structure with numerous external links is a common tactic for distributing malware or leading users to scam pages.

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://miller-senior-po-1.rominastiebenphotography.com/uploads/1/3/0/8/130813897/130813897.html#the+witcher+livros+online
    • http://fitranxgb.com/uploads/1/3/1/1/131164205/pikizin_jepedix_bexaretim.pdf
    • http://capoeirafitbrooklyn.com/uploads/1/3/1/1/131164476/gijosomotiwe.pdf
    • http://sintonrobotics.org/uploads/1/3/0/5/130551279/8151762.pdf
    • http://sharpsbilliardsak.com/uploads/1/3/1/3/131379586/givemurinopudam.pdf
    • http://closethegaetz.com/uploads/1/3/0/9/130969439/sidapibijovemo.pdf
    • http://peacefulwaterscounseling.org/uploads/1/3/0/5/130544734/42138622f57.pdf
    • http://douglasrealtor.com/uploads/1/3/0/6/130639966/lobuxerob.pdf
    • http://trainzulupeak.com/uploads/1/3/0/3/130323806/koweguti.pdf
    • http://jimkatz.com/uploads/1/3/1/0/131070044/nowogoran-xigigalogafel-gepilesemen.pdf
    • http://visionsednetwork.com/uploads/1/3/1/3/131398020/namokokasefe.pdf
    • http://acesdeli.com/uploads/1/3/0/6/130639599/vasabikuwobo.pdf
    • http://envisiongeographics.com/uploads/1/3/0/4/130435679/5175159.pdf
    • http://nau-systems.com/uploads/1/3/1/4/131453171/5192909.pdf
    • http://blueridgesupply.net/uploads/1/3/0/2/130289571/887692bad8.pdf
    • http://frasierhealthcare.com/uploads/1/3/0/4/130476413/94454c.pdf
    • http://aaprpcalifonria.org/uploads/1/3/1/6/131636949/susezuli.pdf
    • http://antoniodiazjerez.com/uploads/1/3/0/5/130551262/nirejisogabotod.pdf
    • http://truenorthchaga.com/uploads/1/3/0/6/130620982/4668122.pdf
    • http://highlandpropertymanagement.org/uploads/1/3/0/6/130640236/8462101.pdf
    • http://thevisualnarrative.com/uploads/1/3/1/3/131383251/soxosi-julipitaf.pdf
    • http://clintoncountycasa.org/uploads/1/3/1/4/131407111/vepiwipexarenaxi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000965b.bin
3b16036014529776028e70178c731a5ff9efc3d4725c7226f67a1b1b00db2f2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x965B 14376 bytes

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