Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce17cd2699437ed6…

MALICIOUS

PDF

86.2 KB Created: 2021-03-18 15:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0994523821d8614543bbaaaf0df3c574 SHA-1: 9db9827e40ce2d94c187d57d3f6386e55dcb1e54 SHA-256: ce17cd2699437ed6245e19d3b661363790f867b569a2f8fba0c3929c88c1b8ea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/strik?utm_term=que+dia+cae+feriado+en+noviembre+2020 PDF link annotation
    • https://cdn.sqhk.co/xidupesijij/qjdhhid/fruit_cut_smash_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rizitewav/WhegdxG/genobopabaz.pdfIn PDF document text
    • http://vavazexowupex.medianewsonline.com/37818194265.pdfIn PDF document text
    • http://topcabinets.xyz/rabemisidonukixuzi0aqel.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/how_to_carry_a_tactical_knife.pdfIn PDF document text
    • http://raisinshq.club/ipad_pro_start_guidew3xh4.pdfIn PDF document text
    • http://starkrobotics.org/klwp_live_wallpaper_maker_pro_keylbue8.pdfIn PDF document text
    • https://cdn.sqhk.co/reromiwo/haxvmhc/cute_green_frog_emoji_stickers_app.pdfIn PDF document text
    • http://dontbeshy.xyz/sadanaqi7w.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://8f59ffc6-1281-4225-bf60-9833eedd4ad8.filesusr.com/ugd/e3c460_faa512ec0a49461c84a2759ab5defea7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wekibik/funny_riddles_in_marathi_with_answers.pdfIn PDF document text
    • http://vokerajud.epizy.com/xubejekafototudorumu.pdfIn PDF document text
    • http://nekanonesogur.rf.gd/zagibefuvuwodavadawef.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/new_movies_telugu_2016.pdfIn PDF document text
    • https://83bd47e3-138d-48d8-8d00-514fe13b91b0.filesusr.com/ugd/c87a2f_ef5ea758c12a4937b24a5a2fd2203cdb.pdf?index=trueIn PDF document text
    • https://b81f28a7-a6cc-4df9-aebb-a76b708ee4b5.filesusr.com/ugd/df05b2_0898a3df66384891a2ccdee8b4e74606.pdf?index=trueIn PDF document text
    • http://vedukewopaw.rf.gd/bagan_keyboard_for_android_free.pdfIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_786054df4c0247edbe238bd1df2c87ec.pdf?index=trueIn PDF document text
    • https://f4dd034e-00c7-465c-b850-fb2d75accad5.filesusr.com/ugd/769f78_7d45830155e042f7a40fce903a814258.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/21208398569.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/lord_of_flies_book_movie.pdfIn PDF document text
    • http://mapesag.epizy.com/sebomuku.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_off000104dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DD 5296 bytes
SHA-256: 653cdf7a83808187976cb14f87993c60cd857299a34d250e43469c80e0647b34
font_01_sfnt_off000116c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C1 11312 bytes
SHA-256: 5aa78207698e9b9eadcc91cfb8c761a7c7d72273a3546adbf3be4e6246041ba3
font_02_sfnt_off00013d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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