Malicious PDF — malware analysis report

Static analysis result for SHA-256 745e827eaab0163c…

MALICIOUS

PDF

37.8 KB Created: 2020-04-10 05:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4c4f9bdd3670c212717eb46b47adaeac SHA-1: e31c13049f411f2e6ad22d8d809732e62674a62d SHA-256: 745e827eaab0163c3c40e97ccbf70f7d8bdd441c831ce280ea9d302cce879912
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, many of which are numeric slugs pointing to PDF files, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs points towards an attempt to redirect users to potentially malicious content. No scripts were extracted, but the structure suggests a lure to external resources.

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://myacexportfolio.com/uploads/1/3/0/5/130543170/130543170.html#weber+spirit+ii+e-210+natural+gas+hookup
    • http://sooversociety.com/uploads/1/3/0/5/130539319/380101.pdf
    • http://saltandjuniper.com/uploads/1/3/0/6/130621378/b7869925b7b4.pdf
    • http://sheanaturalskincareproducts.com/uploads/1/3/1/3/131384396/furizixo_jewovemakur_fozilejuxito.pdf
    • http://is-tbc.info/uploads/1/3/0/9/130969072/nulexo-ritotuvomun.pdf
    • http://eyeslipsandlashes.com/uploads/1/3/0/8/130814675/2165276.pdf
    • http://cocorayefit.com/uploads/1/3/0/5/130539350/1328253.pdf
    • http://sell-power-tools.com/uploads/1/3/0/6/130604627/8513771.pdf
    • http://jesscoxart.com/uploads/1/3/1/4/131410434/veseluzeze.pdf
    • http://blossositedesign.com/uploads/1/3/0/7/130776295/d1f42670.pdf
    • http://lambsautosales.com/uploads/1/3/1/4/131455508/2140335.pdf
    • http://simplynaturalbirthservices.com/uploads/1/3/1/4/131454098/5848661.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_off00006b77.bin
1387957b34adff16939a7bdf92b9dbfcb3b051808a8d56128e356e37c3328903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B77 7824 bytes

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