Malicious PDF — malware analysis report

Static analysis result for SHA-256 c214c3c9b634de7f…

MALICIOUS

PDF

78.8 KB Created: 2021-03-28 18:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 05c001f48500c80ddffa3651bb3ee3ef SHA-1: 27ebb36bfab3eeeef49af4acd938d4c3016ce420 SHA-256: c214c3c9b634de7f052fbe487bb2281373f4dcdff90596693fac9546d7c59bc0
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. The presence of external URIs and the 'link farm' heuristic further support this, indicating the document's primary purpose is to redirect users to potentially harmful content.

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
  • 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://zajinet.ru/strik?utm_term=quran+with+urdu+translation+and+tafseer+online PDF link annotation
    • http://gigewaxupupixe.22web.org/jatanakabeja.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/rovemuzikutusexepatfm80.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/runovonekizage21btv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5fdacb0d7e5be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416664/normal_6048287908e22.pdfIn PDF document text
    • http://metazoaapc.fun/alone_status_share_chat_kannada8n3qs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454973/normal_5fe6450d1d797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488349/normal_602af1228847c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417525/normal_6052b596ae73a.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/43898999183.pdfIn PDF document text
    • http://relodifalixogo.scienceontheweb.net/livre_pour_apprendre_l_allemand.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/the_divergent_series_full_movie_download_in_hindi_720pxz2tx.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/logitech_k400_unifying_receiver_replacement.pdfIn PDF document text
    • http://mpvideo.org/how_to_do_task_analysis06sdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503214/normal_602b5711f07fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379722/normal_5ff56da352972.pdfIn PDF document text
    • http://afracheat1.xyz/sudo_command_in_linux_with_examplesej91x.pdfIn PDF document text
    • http://mon-cmso.best/how_to_assemble_a_sunbeam_oskar_food_processormtwm6.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://komeguvupide.epizy.com/how_to_change_a_thermostat_for_electric_heat.pdfIn PDF document text
    • http://fiwixowu.rf.gd/allstate_critical_illness_insurance_forms.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_off0000e8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FE 5028 bytes
SHA-256: 91261b752343baff404dbce04e3edb8165e47e5d13543f7a5e039e0804f62874
font_01_sfnt_off0000fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 11140 bytes
SHA-256: f180a7828023ce937fd166d99911de5899750d719f8a43a281bbe5c2cdda155a
font_02_sfnt_off00011f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F98 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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