Malicious PDF — malware analysis report

Static analysis result for SHA-256 792fe698ea2a666e…

MALICIOUS

PDF

73.2 KB Created: 2021-03-01 14:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a83292f01fec521997ae1122fd36dd81 SHA-1: a2e8199ab306a94e8bd5bfa0b1ad7071af743a31 SHA-256: 792fe698ea2a666eef46967f29d4810f56bac813dbcd54a3ed4cdf086b85a69c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing operation. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates the presence of command execution tokens within the document text, potentially for downloading or executing further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wb?keyword=tone%20it%20up%20lower%20ab%20workout PDF link annotation
    • http://zaralutodunuwa.66ghz.com/tifapepimukevezakasis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410432/normal_5fcef82d9b01d.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/2006_scion_xb.pdfIn PDF document text
    • http://felidefewipikig.22web.org/3638238456.pdfIn PDF document text
    • http://fruitslope.online/telecharger_whatsapp_2018_apk_gratuit_pour_androidthtc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5fe0340757d1c.pdfIn PDF document text
    • http://trenketo.buzz/wamoxaberasijmplfj.pdfIn PDF document text
    • http://1xbet-regi.site/how_to_pray_for_court_case4udh0.pdfIn PDF document text
    • http://air-calm2.club/bicep_curl_proper_forme9ebs.pdfIn PDF document text
    • http://boxidodo.22web.org/roblox_royale_high_piano_sheet_music_faded.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/badger_1_2_hp_garbage_disposal_lowes.pdfIn macro / runtime command snippet
    • http://xukewatamom.22web.org/2002_cadillac_escalade_service_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_60274a6b94fbd.pdfIn PDF document text
    • http://boxidodo.22web.org/roblox_rIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fulapokop.epizy.com/fisirefomobusatoganem.pdfIn PDF document text
    • http://kutelitowolobe.rf.gd/mini_14_scope_mount_picatinny_rail.pdfIn PDF document text
    • http://tamedigozetot.epizy.com/gigebotiberiwas.pdfIn PDF document text
    • http://vetuvadoxawiton.epizy.com/90756594842.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_off0000e3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A3 4880 bytes
SHA-256: e69e7592ec8a36385352fca4365a9aa1402bedeef68787756078128e0feffdf6
font_01_sfnt_off0000f455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF455 10272 bytes
SHA-256: b80ef4862c9a06de6990368eebda54bf3006165b9d054e9634f141d80ed33df0

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