Malicious PDF — malware analysis report

Static analysis result for SHA-256 e347d1c2b6146bcb…

MALICIOUS

PDF

66.6 KB Created: 2021-04-07 04:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e25459c8cc30de46269b2c0de42299e1 SHA-1: de22e71fe60eca46cbfd4b1019a9c65e96be1b34 SHA-256: e347d1c2b6146bcb9c35bc44fdb396177bfe63a26368632b63798f55ce21dbb2
126 Risk Score

Malware Insights

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

This PDF is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains multiple embedded URLs, with one pointing to a suspicious domain 'vilenefex.ru' and another to 'lutepebenunara.rf.gd' which is identified as a link farm on disposable hosting. The document body, though heavily obfuscated, suggests a lure related to 'Troy bilt super bronco tiller parts manual'. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=troy+bilt+super+bronco+tiller+parts+manual
    • https://cdn-cms.f-static.net/uploads/4383921/normal_5fd797afacb54.pdf
    • https://cdn-cms.f-static.net/uploads/4413454/normal_6022670eee07b.pdf
    • http://moradudipomibo.mypressonline.com/site_electrical_engineer_interview_questions_and_answers.pdf
    • http://gapojigewe.22web.org/89979536109.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lutepebenunara.rf.gd/vitus.pdf
    • http://tekabexorita.rf.gd/lujejejamuze.pdf
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_e96915e2833744079d203edf54453040.pdf?index=true
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_741d556b2e004917bdb89026e3486425.pdf?index=true
    • http://geforagegi.atwebpages.com/what_base_do_navy_seals_train_at.pdf
    • http://sazurufupamaxa.myartsonline.com/53340796807.pdf
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_7e249531602f4b4a918f7bf4c0ffee0b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3cc644b7-297b-4910-bb0f-d6a2825e903e/libababafovadowewedemuz.pdf
    • http://fubaragete.rf.gd/73132676673.pdf
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_a1a29013445241278440dbefb2bde2a7.pdf?index=true
    • http://xewaditina.epizy.com/soprador_husqvarna_350bt_manual.pdf
    • https://uploads.strikinglycdn.com/files/3ea9bd67-4f22-4841-947e-eaa998ca0ac8/15355140341.pdf
    • http://titodopitafa.rf.gd/lekiruxafalutebogukiz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbab.bin
4c384bd88c41e642f1794065eccf36859ac5d5e9fbb1893c2b209f693b6d919e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAB 5268 bytes
font_01_sfnt_off0000dd86.bin
6eba5b6d85afd836e46c2004c790fc75e05580bbc94ef12d3711107edc85cf28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD86 9324 bytes

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