Malicious PDF — malware analysis report

Static analysis result for SHA-256 225f85ae6a05b448…

MALICIOUS

PDF

99.4 KB Created: 2021-04-06 14:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1d83738ad0a077b07c8d63341640c65e SHA-1: 17f888850a58bdc81d74bdc522e6e64f110b99e1 SHA-256: 225f85ae6a05b448182a0cdb4ded0d532311729209ac292759a01d9acb57939e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • 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 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.
  • 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
  • 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 https://soxebez.ru/strik?utm_term=the+trials+of+apollo+book+1+sparknotes PDF link annotation
    • http://wagajij.22web.org/73950274054.pdfIn PDF document text
    • https://nodajalij.weebly.com/uploads/1/3/5/9/135990600/kabedimewonum.pdfIn PDF document text
    • https://favesalaliba.weebly.com/uploads/1/3/1/3/131384568/viguginu.pdfIn PDF document text
    • http://kuvijuwe.22web.org/93205743902.pdfIn PDF document text
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/3251298.pdfIn PDF document text
    • https://bilemupu.weebly.com/uploads/1/3/4/6/134654663/bodaduvolagexobul.pdfIn PDF document text
    • https://pawusavexamase.weebly.com/uploads/1/3/0/8/130813618/seluraxu.pdfIn PDF document text
    • https://sutevanu.weebly.com/uploads/1/3/4/7/134770908/e1fca00bdecc00.pdfIn PDF document text
    • https://nolelagisumo.weebly.com/uploads/1/3/4/1/134132353/afe3441.pdfIn PDF document text
    • https://ririsibonegibo.weebly.com/uploads/1/3/4/5/134596323/3597778.pdfIn PDF document text
    • https://nurifekuti.weebly.com/uploads/1/3/4/5/134516663/sumigafabonog_pudonikenapoz_logokitosuj_rodivekak.pdfIn PDF document text
    • https://vizedaxitexoter.weebly.com/uploads/1/3/4/7/134740617/08b6df5.pdfIn PDF document text
    • https://bojuwakuxejekur.weebly.com/uploads/1/3/5/3/135347713/puguvalugajiza.pdfIn PDF document text
    • http://gemixemufasu.22web.org/semiconductor_devices_and_circuits_aloke_dutta_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://durezalur.epizy.com/echo_chainsaw_manuals.pdfIn PDF document text
    • http://gubunetoz.rf.gd/rudatagukomisasokivuda.pdfIn PDF document text
    • http://vulofuza.epizy.com/edgar_allan_poe_books_free.pdfIn PDF document text
    • http://guvawegudisow.epizy.com/vagevowawositetope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cf7bf88-45b3-49b4-ada9-62f17c672891/rotijejinomexiwoluzikef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c1c2f4-ecc0-41ce-b61f-f473cec47094/51276104176.pdfIn PDF document text
    • http://misosemarimo.rf.gd/48009577853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf8a9c2-0423-4113-81f4-3beb58664adb/89116669221.pdfIn PDF document text
    • http://ludilisi.epizy.com/vuminolipano.pdfIn PDF document text
    • http://vezubigaru.rf.gd/cancellation_of_development_agreement_format.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000132ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132CA 4388 bytes
SHA-256: 462fd634e2ff0d877e25559efbf9d0e6ecced427fd7c07f16047763489c18a02
font_01_sfnt_off0001424c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1424C 5196 bytes
SHA-256: f4272b32f509c128bcdd8ab8d443f024ac3d92eec822acba21ab12438b5bb97c
font_02_sfnt_off000153ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153ED 13432 bytes
SHA-256: 04459fb5392930f048c8d5b0609c4a2370f88744057d721b4ecf786cb46dd03f