Malicious PDF — malware analysis report

Static analysis result for SHA-256 41096ea48c0be7b9…

MALICIOUS

PDF

36.5 KB Created: 2020-04-28 18:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 18aa604fc6a6f8a47d6db95026a04a95 SHA-1: 356d7de2f127618d3b4c20f1bcb7394ea98ffa94 SHA-256: 41096ea48c0be7b95a5cb09552c4b61db9a8d681942172af5b3cce5e855f1ba8
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm. The ML classifier strongly indicates maliciousness. The document body, though heavily corrupted, contains references to URLs and potentially a lure related to 'father's day worksheets'. The primary attack pattern appears to be SEO manipulation or directing users to potentially malicious content hosted on numerous domains.

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://acouturelife.com/uploads/1/3/0/6/130604445/130604445.html#father%27+s+day+worksheets+for+preschoolers
    • http://francescopanzetti.com/uploads/1/3/0/2/130273617/riduvonusodij.pdf
    • http://champagnesmileau.com/uploads/1/3/0/6/130620454/2726258.pdf
    • http://orderofpan.org/uploads/1/3/0/9/130969430/575529.pdf
    • http://bewnanskernow.org/uploads/1/3/0/6/130621191/rowakatupipepi.pdf
    • http://10dayscreditboost.com/uploads/1/3/0/6/130620567/gevosafax.pdf
    • http://marionbridges.com/uploads/1/3/0/7/130739324/godafigu.pdf
    • http://elizabethlangs.com/uploads/1/3/0/2/130273842/woxonivoga_konapurofakopug_zanepux.pdf
    • http://serviciosrojocom.com/uploads/1/3/0/8/130874059/sudirigej-jodisop-saranoj.pdf
    • http://independentlivingfortheaspiringmusicianmerchandise.com/uploads/1/3/0/4/130476065/7136134.pdf
    • http://kenyasklosset.org/uploads/1/3/0/6/130620747/273bb2.pdf
    • http://runamucktheatre.com/uploads/1/3/0/8/130814083/pumoperulusizalejila.pdf
    • http://hostmaster.passionforparity.org/uploads/1/3/0/5/130588584/wiwemabosiwo_bewezoresuvalo_faleruf.pdf
    • http://freshpickedsoaps.com/uploads/1/3/1/4/131454190/muxukegopeva.pdf
    • http://maynard-breese-printing.com/uploads/1/3/0/8/130874612/pipezoveda.pdf
    • http://kenyasklosset.org/uploads/1/3/0/6/1306
    • 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_off000063a7.bin
24082144435eab5adf287c7ce8ce30bfb2a7bbceacf613c33ecc208f6d49a2bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A7 8364 bytes

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