Malicious PDF — malware analysis report

Static analysis result for SHA-256 5615ae45d60ba939…

MALICIOUS

PDF

74.3 KB Created: 2021-02-25 04:22:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 30ac4f23bfb3caf12118d444447f23f5 SHA-1: 30d59d1b8a65b049b26d1abf88810857851733e7 SHA-256: 5615ae45d60ba93903b0d844ce406be014888616e6935387a7f4d2c77e3f898a
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The heuristic 'SE_LOLBIN_RUN_COMMAND' firing with references to 'curl_machine_form.pdf' and various URLs further supports the malicious nature, suggesting the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://seumenha.ru/wix?keyword=words+with+2+c%2527s+in+them PDF link annotation
    • https://xikunozazoteta.weebly.com/uploads/1/3/1/4/131453294/5635f59df.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/can_you_have_a_cdl_and_a_medical_card.pdfIn PDF document text
    • https://ruxibudowivuk.weebly.com/uploads/1/3/4/7/134728491/9742317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465249/normal_603433a0402a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426271/normal_5ff6354ef3d7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_60149063380b8.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/international_4300_turbo_actuator.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/KgfKic6/crazy_coin_spin_master.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/mofipife/gfazMc3/13523128330.pdfIn PDF document text
    • https://kitopelok.weebly.com/uploads/1/3/4/3/134355781/lerujil-punuresogujabom.pdfIn PDF document text
    • https://wiruwopifezub.weebly.com/uploads/1/3/4/3/134345133/1112726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422877/normal_5fd708bce6433.pdfIn PDF document text
    • https://cdn.sqhk.co/posogamumut/aYv45gf/gukeli.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/5mhg0HE/relaxing_spa_music_10_hours.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412151/normal_5fd915520c91c.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/inIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofezinidabefu.epizy.com/zebexuxofunewugefevafagov.pdfIn PDF document text
    • http://guxajez.rf.gd/bicep_curl_machine_form.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/27064074175.pdfIn macro / runtime command snippet
    • http://dowirimidezifa.rf.gd/78639286275.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/sobajapimokide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CC 5208 bytes
SHA-256: 4617d8d6db0838ef7d66869707a8f3643f7c8ce9ffb8e00b429fad85ab55eda9
font_01_sfnt_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 10504 bytes
SHA-256: f5898ec079edc543a0a7e41665674426eda0b803d732f2fcf237114012a3191d

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