Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e68aff3918caef3…

MALICIOUS

PDF

80.3 KB Created: 2021-03-12 10:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0dfd344db46f3d5e6035df47b2832aba SHA-1: 8f83c9172279cd0d67a283680e9f016b14910918 SHA-256: 0e68aff3918caef3524b1ca3fee0a909e11d2ba99c9ed0cd9baac05ff6f16b0d
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It functions as a link farm, presenting a deceptive 'electrical engineering syllabus pdf' lure to encourage users to click on numerous external links hosted on disposable domains, likely to lead to further malicious content or exploits. The presence of external URIs and a link farm heuristic strongly suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=electrical+engineering+syllabus+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386089/normal_5fe9ee54e21dc.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/ecj2xjf/stress_ball_price_in_pakistan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407562/normal_5fdf5810efb75.pdfIn PDF document text
    • https://cdn.sqhk.co/buzivafulet/iONazH6/thyristor_scr_datasheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464862/normal_6034db9036a5d.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/fheIiju/faxevunowajawosezikadixi.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/V1jRkif/sitam.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/5gfgjge/77527013091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_60404551ac269.pdfIn PDF document text
    • https://cdn.sqhk.co/kalusoxat/jjhfhbH/bizajurut.pdfIn PDF document text
    • https://cdn.sqhk.co/nukunudakiju/ShacUcP/ludo_online_unity_multiplayer_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_60226aca135f6.pdfIn PDF document text
    • http://xekedofaki.iblogger.org/baby_girl_shoes_size_4_walmart.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://voronuxo.epizy.com/25799307643.pdfIn PDF document text
    • http://poravilotizeve.epizy.com/21047286894.pdfIn PDF document text
    • https://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_6f95059eaf414a9987525b97a4ad32df.pdf?index=trueIn PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_177e8d317d7249189021f9b7a25def7d.pdf?index=trueIn PDF document text
    • http://wavudipikudela.epizy.com/collar_x_malice_mineo_guide.pdfIn PDF document text
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_144f884d3cc44cf9a4374836c858517d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90ed61a-c7ae-47d0-9707-9ded54f44e64/lazekopexobiwetipududu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0bb5194-1138-4ff4-b38c-c7dbfbdd074c/crpc_bare_act_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFA 5292 bytes
SHA-256: b68fdd5a374e7a044cf087c9a377c25f1814fe25fa129431650c8fe2c4e5bd79
font_01_sfnt_off000100fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FB 10872 bytes
SHA-256: ff06172288b3b208299045ae08a49bc4d2a1a4a9d4d95027b505bc55c2595958
font_02_sfnt_off000125df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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