Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed92e33ff96eff93…

MALICIOUS

PDF

80.8 KB Created: 2021-04-06 00:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7481df4ff9e8db94ac9386cf4ce628db SHA-1: 601eccdb1f6a95d63716f4da9e92e815cb5ef876 SHA-256: ed92e33ff96eff934338a64d084615c9914cc0870cbc74fc12be8c3c258f5261
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to zajinet.ru, suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, appears to be a lure related to learning Arabic online, which is likely a pretext to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=how+to+learn+quranic+arabic+online PDF link annotation
    • https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/0a74011.pdfIn PDF document text
    • https://faxasuxudoxo.weebly.com/uploads/1/3/2/6/132695360/1673204.pdfIn PDF document text
    • https://gefererasixo.weebly.com/uploads/1/3/4/7/134749514/pubagetewuwutifiz.pdfIn PDF document text
    • https://finamiwowekizo.weebly.com/uploads/1/3/2/3/132302732/vudaki_vepifijaje.pdfIn PDF document text
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/xesekewunu.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/materi_akuntansi_dasar_kelas_10_semester_1_kurikulum_2020.pdfIn PDF document text
    • https://tasusigogifu.weebly.com/uploads/1/3/5/3/135303518/fadusorido.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/58990849638.pdfIn PDF document text
    • http://desepevadijowu.22web.org/clay_brick_making_business_plan.pdfIn PDF document text
    • http://xijeboxebifariz.22web.org/gitujekunokizofezoweg.pdfIn PDF document text
    • http://nateribebomulaz.medianewsonline.com/essential_business_communication_skills.pdfIn PDF document text
    • http://rotiwopofeze.mywebcommunity.org/curso_de_espanhol_bsico.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_f7cef3c0a0df45b4a9d12834f4adaa53.pdf?index=trueIn PDF document text
    • http://bafuwujix.atwebpages.com/ratukabawevel.pdfIn PDF document text
    • https://d397443b-80d0-4e74-967c-4ce830ee3754.filesusr.com/ugd/0a76f0_261aabb109ef41098f4dfcc4f26d674d.pdf?index=trueIn PDF document text
    • http://zavodopivuzaraf.epizy.com/captain_tsubasa_game_ppsspp_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/jasegajoburamixav.pdfIn PDF document text
    • http://sugudilun.epizy.com/83494619058.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/list_of_human_trafficking_organizations_in_texas.pdfIn PDF document text
    • http://xonelamurojili.rf.gd/mexoge.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_off0000fece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECE 4932 bytes
SHA-256: b6914494e587d9815bfe27047702c98ebd6c5bb3fdad09e422760e61163591a3
font_01_sfnt_off00010fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB8 11516 bytes
SHA-256: 9cc00c4695cf17afecd092d9f47ac85df2a3a93f75a3f9f54d426c226aeac041

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