Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9787d9466ff470…

MALICIOUS

PDF

78.6 KB Created: 2021-03-15 16:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7d0ff490f4f244ade2b501f656df89b SHA-1: dd015091fbf8b25a38873d62989a0aaeca92146d SHA-256: 4e9787d9466ff4704c93c7f17de86645890e8d23dfdda09590187af15268f55b
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially corrupted, contains text suggesting it's a lure related to a search query. The presence of external URIs, particularly one pointing to 'ponafet.ru', strongly suggests the document is designed to redirect users to a malicious site for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is part of a link farm hosted on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://ponafet.ru/strik?utm_term=can+i+use+my+own+wireless+router+with+fios
    • http://fresh-ita.space/fixoveregomekevaribok3blq8.pdf
    • https://cdn-cms.f-static.net/uploads/4391898/normal_5fe6dacfbdac8.pdf
    • https://static.s123-cdn-static.com/uploads/4408990/normal_5fe02b93811a3.pdf
    • http://good-production9.site/33869603465t7zu6.pdf
    • https://cdn-cms.f-static.net/uploads/4459060/normal_5fe707a29ee16.pdf
    • http://kosolamod.22web.org/7548287582.pdf
    • http://securityverifiedservices.com/35847910325l67d9.pdf
    • http://tatuxuvoziparu.mywebcommunity.org/20911872534.pdf
    • http://fufirewavit.getenjoyment.net/seravepovupasanepupo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tokozod.myartsonline.com/85932968547.pdf
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_12bc8db517714b30bdbdf126b09622bb.pdf?index=true
    • http://najovuwovi.rf.gd/gingerbread_house_coloring_sheet.pdf
    • https://uploads.strikinglycdn.com/files/2ebef469-364f-4ddc-b772-327588898c9b/polk_audio_psw505_owners_manual.pdf
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_b45a31d929224bc8b3f400d0c34995db.pdf?index=true
    • http://jebujuv.rf.gd/19083845819.pdf
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_a82cca9c746044918606dab633877f74.pdf?index=true
    • http://rizivubonulej.atwebpages.com/76248195941.pdf
    • http://namutogenasokab.epizy.com/xuravavuvaraze.pdf
    • https://uploads.strikinglycdn.com/files/84d8b69f-6365-4c96-b430-ff5a9e6fe122/how_to_apply_for_food_stamps_online_in_north_carolina.pdf
    • https://uploads.strikinglycdn.com/files/f7d231c4-d2b8-478b-9f18-42ad1d8adf76/par_quoi_remplacer_le_sel_de_lave_vaisselle.pdf
    • http://wowesuwufurofak.rf.gd/girivazetakawu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8cc.bin
fa37b08a68cacbb76cf02751f3177700c169c986df509a83e763748d68b27b12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CC 5108 bytes
font_01_sfnt_off0000fa14.bin
1879a09b2f7cf781737503371d85cb354e9ec0d19292e17e0ef41aaa5c692f46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA14 10608 bytes
font_02_sfnt_off00011e6e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6E 4324 bytes

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