Malicious PDF — malware analysis report

Static analysis result for SHA-256 592124256c0ca041…

MALICIOUS

PDF

141.2 KB Created: 2021-03-25 16:30:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 78dbf5ce7b1d8b51f0f2ba7ae9fe2da8 SHA-1: 904368c78079379a92a67eb5ac7a400a7ccea1a1 SHA-256: 592124256c0ca041120ea47720f6c4afaacc2280011bdf28eae5c6f4a4e890c6
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The presence of urgency language suggests a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate it's designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pelibifir.ru/123?utm_term=best+authentication+app+android PDF link annotation
    • http://bimosoxadiz.22web.org/how_to_become_a_resume_writer.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/inner_sea_world_guide_reviewpk795.pdfIn PDF document text
    • http://gajelifuluxapov.mywebcommunity.org/critical_thinking_for_helping_professionals_a_skills_based_workbook.pdfIn PDF document text
    • http://dibosezufo.getenjoyment.net/97963678876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_6059f1d5b737e.pdfIn PDF document text
    • http://changepass.online/battleground_games_mod_apkss0ly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476925/normal_600ffae618834.pdfIn PDF document text
    • https://wiromokuxuzub.weebly.com/uploads/1/3/5/2/135298753/rotozotutizimobi.pdfIn PDF document text
    • http://kiritisivasol.mywebcommunity.org/wuxudaredoxetanaz.pdfIn PDF document text
    • http://visiblawty.com/is_asuna_in_season_3lr95o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_600bfcf219a52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388048/normal_5ff046a1da5af.pdfIn PDF document text
    • https://dunujamovexen.weebly.com/uploads/1/3/4/3/134361976/bc7d94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488092/normal_6012b922f2c83.pdfIn PDF document text
    • http://doctora.club/nmrwh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_600ffe3509a6a.pdfIn PDF document text
    • http://fusizexa.22web.org/nofotinudoresisupad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://butorinowu.myartsonline.com/basics_of_aerothermodynamics.pdfIn PDF document text
    • http://fowafad.epizy.com/application_of_biotechnology_in_environment.pdfIn PDF document text
    • http://ruzijuva.rf.gd/15887276589.pdfIn PDF document text
    • http://tunawumananedi.rf.gd/hampton_bay_ceiling_fan_light_not_working.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C671 5060 bytes
SHA-256: 0827d667f1b07cf9c007ee09123560a94ea36ec02e604516b48af8438e317957
font_01_sfnt_off0001d790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D790 11340 bytes
SHA-256: e37100447f26f039114421c27cd786f2184f7d841a4608e283e53c325cde7851
font_02_sfnt_off0001fdce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FDCE 17876 bytes
SHA-256: 1785755a8b6812658df9daad8005731e11810a32c8e6656fed0322cff40a8ec5
font_03_sfnt_off00021875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21875 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3