Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce59f1608696bb3e…

MALICIOUS

PDF

91.2 KB Created: 2021-03-21 00:10:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ce9e818f26f611cc738a50999b52eefa SHA-1: b53e094ba13dfc0d0d0b6a87e57ea17f644b11e5 SHA-256: ce59f1608696bb3edde999d5dc38360dc3c1608b670b92c3b069c0a0beaac183
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for 'Stihl carburettor tool', indicating a lure for users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests this PDF is part of a link farm designed to attract traffic, likely for malicious purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as phishing and a Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://druttle.ru/wix?keyword=stihl+carburettor+tool PDF link annotation
    • https://cdn.sqhk.co/waxoxewanuvi/J4pjaij/lost_stories_of_jesus.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/what_age_is_24_26_inch_chest.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/coleman_portable_hot_tub_error_codes.pdfIn PDF document text
    • https://sifofazawovetix.weebly.com/uploads/1/3/0/7/130776166/xejotakukoxex.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/american_red_cross_cpr_and_first_aid_study_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/cdihv6X/43678809832.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/apc_550va_line_interactive_ups_surge.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/53803750279.pdfIn PDF document text
    • https://razomidubijime.weebly.com/uploads/1/3/4/3/134395635/d042d8c8b.pdfIn PDF document text
    • https://cdn.sqhk.co/xugiwatokax/gHLhexp/labutatagu.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/DEJjigi/lufutisotadevomog.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/NbSMhd9/9689089822.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
    • https://uploads.strikinglycdn.com/files/96267a18-cb11-48f3-9d8a-0b283aca4e89/2661631175.pdfIn PDF document text
    • http://vevasog.epizy.com/38789521047.pdfIn PDF document text
    • http://lozabozirazal.rf.gd/how_much_is_midnight_sun_on_audible.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/84382122131.pdfIn PDF document text
    • http://vurorawoguw.rf.gd/mounting_bracket_for_minn_kota_power_drive.pdfIn PDF document text
    • http://wojepofikisad.rf.gd/wawelubawagisidusiwuruzob.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/sorefapa.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/wopanomubimudex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68037220-d0c4-4d66-bfb0-9b981d22896a/ronco_showtime_rotisserie_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c49fe426-d031-4f27-887f-680293aa0806/73169748876.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/anitha_o_anitha_song_naa_songs.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_off00011aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AED 4728 bytes
SHA-256: d6b2da74ba86047eab825465dd68af667bf13ea6fc3f4af409f673ae816fa1c5
font_01_sfnt_off00012b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B09 11068 bytes
SHA-256: 6d7c2e9e5dd3f6dfd789ca8b775e1ef93645d59da686a309e32d98f3e602f184
font_02_sfnt_off000150e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150E6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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