Malicious PDF — malware analysis report

Static analysis result for SHA-256 25eac4d820f83791…

MALICIOUS

PDF

70.5 KB Created: 2021-06-11 06:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 011d4c700cd4c109ac0c9f01dfbc01c9 SHA-1: 906fa1324fbe04bc206e8a25676fee9c4f8244dd SHA-256: 25eac4d820f837912c50897c843ee378ff4d41611a3773714c82c505adab6f5a
124 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, with ML and ClamAV flagging it as malicious. The embedded URL and document body suggest a lure related to wealth, likely intended to redirect users to a malicious site for phishing or malware delivery. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8212

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://oniceh.ru/pbw?utm_term=who+is+the+second+richest+man PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451752/normal_60b95ca727e00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5fda41c0df603.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4493881/normal_60b74a4b188db.pdfIn PDF document text
    • https://nalebetiraj.weebly.com/uploads/1/3/4/6/134669494/dexepopij.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4392650/normal_60afe368d99b3.pdfIn PDF document text
    • https://repepojopojak.weebly.com/uploads/1/3/5/9/135970902/e5294.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470535/normal_6007ae615460e.pdfIn PDF document text
    • https://nakakikixug.weebly.com/uploads/1/3/4/4/134490848/gadab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/378a1d8d-00b8-455e-b129-e2618581bd55/how_to_calculate_gaap_revenue.pdfIn PDF document text
    • http://refarumiba.pbworks.com/w/file/fetch/145102566/sadie_red_dead_redemption_2.pdfIn PDF document text
    • http://dizugizup.pbworks.com/w/file/fetch/145103157/boviwajumebifosam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a74488-219a-4cc7-8e8f-b23ed1f61b05/jovijitumigugekezasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a522100-2633-4c32-b6aa-4556ed00a589/78994757552.pdfIn PDF document text
    • http://lonazetubuz.pbworks.com/w/file/fetch/144969441/vadura.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144426882/bolokubukawiroj.pdfIn PDF document text
    • http://fepewuwakow.pbworks.com/w/file/fetch/144502929/51634990442.pdfIn PDF document text
    • http://fevawigo.pbworks.com/f/27487568880.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/w/file/fetch/144461691/anagram_solver_free_scrabble.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F5 5160 bytes
SHA-256: 615ea616666d856be28294d83ed797f1abf178a8e97dc90ad40c630bae585ba1