Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a474ed79c681ed…

MALICIOUS

PDF

38.0 KB Created: 2020-04-17 12:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9c760dce65656e6cb3c8fc6f17a8a521 SHA-1: 800c71bcd16ff12f365b0baf3161bc4adec30fb7 SHA-256: 70a474ed79c681ed8da31b786bb15251244c732b07696e39ae7a8c8f7b6ce5d0
96 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links to external websites, a technique often used for SEO spam or to redirect users to malicious content. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs supports a phishing or content-luring attack pattern. No scripts were extracted, but the sheer volume of external links suggests an attempt to drive traffic to potentially compromised or malicious sites.

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://notmypresidenttrump.net/uploads/1/3/0/7/130739826/130739826.html#school+days+vip+unlocked+apk
    • http://ivyleagueteacher.com/uploads/1/3/0/7/130738631/7061436.pdf
    • http://septiccleaningsalem.com/uploads/1/3/0/4/130488621/vaviwewuniger.pdf
    • http://nilaskirukkal.com/uploads/1/3/1/4/131407235/kesawiwanivej.pdf
    • http://skippackcreekconsulting.com/uploads/1/3/0/6/130621292/votag.pdf
    • http://djlsservices.com/uploads/1/3/0/7/130738676/4398360.pdf
    • http://haileylowexo.com/uploads/1/3/1/3/131380480/vawabovajasi.pdf
    • http://velvetdrivevintage.com/uploads/1/3/0/5/130546497/4103100.pdf
    • http://aevablack.com/uploads/1/3/1/3/131384359/2502175.pdf
    • http://sunvallyprop.com/uploads/1/3/0/4/130476403/nefepuzagefu_mepula_papijurubaz.pdf
    • http://purrfectionpettransport.com/uploads/1/3/0/6/130620997/pimudex_latok.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_off00006b6f.bin
ed2050c2e655069b04fe352c98dfab7aa28b1b0b4876c783f1d4383bf109202e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6F 8432 bytes

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