Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d62388dfe676acd…

MALICIOUS

PDF

76.3 KB Created: 2021-04-03 08:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b063e504b2f2247fc661ae3bbbf2308 SHA-1: 7179e25e1f25a80a932ded283508357cc0f3f915 SHA-256: 0d62388dfe676acdad15908b141f1fa0c17cd18b049553ea7579f1b808303913
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'ponafet.ru', suggesting it is designed to redirect users to potentially harmful websites. The PDF structure and embedded links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=casio+hr-8tm+calculator
    • http://desokore.medianewsonline.com/xijiwupofaxalatoripuziba.pdf
    • http://xujukega.66ghz.com/70570314848.pdf
    • http://redpandarecycling.com/nikon_d5200_specsz7r6m.pdf
    • https://cdn-cms.f-static.net/uploads/4488570/normal_605069ae12f99.pdf
    • https://static.s123-cdn-static.com/uploads/4382643/normal_5fed125c6d598.pdf
    • https://cdn-cms.f-static.net/uploads/4445555/normal_602e7a5a75c95.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://rasudilikid.mywebcommunity.org/letifoviwuwibimalap.pdf
    • http://xoxanuf.mygamesonline.org/kokenulomadadanujujira.pdf
    • http://movizopolu.medianewsonline.com/integration_of_hyperbolic_functions.pdf
    • http://toreret.scienceontheweb.net/cambridge_university_logo.pdf
    • https://cdn-cms.f-static.net/uploads/4471114/normal_6028aa9500f88.pdf
    • http://vixesun.iblogger.org/problems_with_joined_report_salesforce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://borebatibi.rf.gd/16947253310.pdf
    • https://uploads.strikinglycdn.com/files/264b24e2-6cf0-4f44-b98b-a561e83ca1ec/weputisejizonanolafe.pdf
    • https://uploads.strikinglycdn.com/files/bdead4a5-cc32-441f-950a-49cb58405fbc/81580660164.pdf
    • http://dogesisile.rf.gd/.pdf
    • https://uploads.strikinglycdn.com/files/52ff17bc-a9bf-4872-bd6d-22981ea226c5/how_to_read_a_barcode_on_your_phone.pdf
    • http://sulevufezokul.rf.gd/safuxuvaravu.pdf
    • http://sixosotonipo.epizy.com/breville_coffee_grinder_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/75abd65b-060e-400e-9ba4-ce26dbe94b92/way_of_four_elements_rework.pdf
    • http://nonidimujosapa.epizy.com/famudibimenikone.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d55b.bin
d8e0964c991f9d46497769d1ce21367c5f2fa57d913528ec0d2e696627c9cbf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD55B 5172 bytes
font_01_sfnt_off0000e6b7.bin
0c77d16a53469b2a3089f84e142756290c3d51f46bb9040aa7737641bc7b0c92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B7 7580 bytes
font_02_sfnt_off0000fb61.bin
0f5e5b79e9469a97dbc20673a66d823fb9150dd4fba133fb62daae9d69d84af9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB61 11680 bytes

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