Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c753cf2ac50e367…

MALICIOUS

PDF

80.5 KB Created: 2021-03-27 11:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e22ec75ffd607fbe20123135ffdd3c56 SHA-1: 72b68407e8d614e1ce4b38d2c8fa7c8d67943c17 SHA-256: 7c753cf2ac50e36725139e650d90407dca52d9badf13012c5bbd053864c5ba22
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 embedded URL `https://dafemum.ru/123?utm_term=anjali+movie+song++in+masstamilan` suggests a phishing lure, attempting to trick users into visiting a potentially harmful site. The PDF structure and the presence of embedded URIs further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://dafemum.ru/123?utm_term=anjali+movie+song++in+masstamilan
    • http://vizojuzoninunoz.scienceontheweb.net/venous_ulcer_treatment.pdf
    • https://cdn-cms.f-static.net/uploads/4404116/normal_600cbfe1cefa0.pdf
    • https://cdn-cms.f-static.net/uploads/4412593/normal_602eee640cfad.pdf
    • http://dorugatutaxovi.scienceontheweb.net/periodic_table_elements_printable.pdf
    • http://paxijivatebul.getenjoyment.net/76909671544.pdf
    • http://xoxapepagaxon.mypressonline.com/mapa_geologico_de_el_salvador.pdf
    • http://paxejunon.mygamesonline.org/pidixekero.pdf
    • http://dosaxixapaxa.medianewsonline.com/how_to_lie_with_statistics_summary.pdf
    • https://cdn-cms.f-static.net/uploads/4366057/normal_602e72cc84cff.pdf
    • http://dotenipago.medianewsonline.com/big_data_analytics_notes_download.pdf
    • https://cdn-cms.f-static.net/uploads/4487665/normal_603dfa6dd48cb.pdf
    • http://wojesukuzak.mygamesonline.org/depinetowulujoxutidune.pdf
    • https://static.s123-cdn-static.com/uploads/4375199/normal_5feb0bdc647ee.pdf
    • http://ginalupajeriw.scienceontheweb.net/kixot.pdf
    • http://jonebukusopovet.mygamesonline.org/handbook_of_drug_metabolism.pdf
    • http://mumijivamivaxij.medianewsonline.com/92524810691.pdf
    • http://mufajaku.medianewsonline.com/pagutoz.pdf
    • http://setafugeridol.scienceontheweb.net/anti_discrimination_law_philippines.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_00c00e392b9d4167982e7a3e3766c780.pdf?index=true
    • http://kewevagisugimuw.onlinewebshop.net/52481412435.pdf
    • https://d7301f0f-9730-4f6e-9d95-601e203cb770.filesusr.com/ugd/253413_057f932ed6bc44e0929bc7eaa936f300.pdf?index=true
    • http://mipagolawalixa.onlinewebshop.net/ver_diarios_de_motocicleta_espaol_latino.pdf
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_2c66cb059e614fa49a3ecdbb780631ee.pdf?index=true
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_db1310777ce449dd8a53f882ea19e9f4.pdf?index=true
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_dd02e33042914623b9ca8328f3fef607.pdf?index=true
    • http://lewinozed.atwebpages.com/forever_young_chords_lyrics_rod_stewart.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_off0000ef7c.bin
9043f40931097c1f56702f07fd5d4e9e242626a61f064ff87315d6a664f95eec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7C 4820 bytes
font_01_sfnt_off0000ffd6.bin
69080856a34c60fe68aaac48975fedab7bf50700768df1000b8c712e2022a5bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD6 11256 bytes
font_02_sfnt_off000125bf.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125BF 4324 bytes

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