Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afd4198b52722e0…

MALICIOUS

PDF

106.7 KB Created: 2021-03-01 14:54:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 66af5b16d93f4a11aeac00a341ef240c SHA-1: bb991b3ee30b030662f572459fa06c1218fa5ae3 SHA-256: 7afd4198b52722e0986944f7a8801e6a48bb1072d88f2a2e5cdc2e141cfbc54d
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a phishing or scam-related lure, likely attempting to trick users into downloading malware disguised as legitimate software or documents.

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://baarspo.ru/strik?utm_term=photoshop+elements+for+dummies+2020 PDF link annotation
    • https://cdn.sqhk.co/nuvexajamu/ijlQhj0/bmx_boy_game_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/mitebosareki/jjdnhiT/likewigutitarubobazisojed.pdfIn PDF document text
    • https://cdn.sqhk.co/mofokamibe/Cxhcgca/13473601777.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvazilu/iahcidB/the_mystery_of_haunted_hollow_2_escape_games.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/dPhdjhX/pinball_prison_escape_classic_cops_n_robbers_3ds.pdfIn PDF document text
    • https://cdn.sqhk.co/jokutevek/xUMiagC/the_inner_world_of_the_immigrant_child.pdfIn PDF document text
    • https://cdn.sqhk.co/besiwowegin/Pha7Fgi/83147669649.pdfIn PDF document text
    • http://wajobok.iblogger.org/semicolon_use_worksheet_2_answers.pdfIn PDF document text
    • http://copyright-infringement.business/53302973216lv7a.pdfIn PDF document text
    • http://italiahot.space/riwiwabenulagolepb6m4e.pdfIn PDF document text
    • https://cdn.sqhk.co/gojapawareke/hbSGhhK/mekeruxijoxibaw.pdfIn PDF document text
    • http://myfavoritesun.xyz/planet_earth_incredible_families4vzrd.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/gfthjgh/xomofuxag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/8305290926.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/movie_oxford_dictionary_definition_of_woman.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/39058265026.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/spreadsheet_birthday_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/alcohol_120_portable.pdfIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/58561771027.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/how_do_you_find_your_house_on_google_maps.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_off00016183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16183 5348 bytes
SHA-256: 0f724083829b96360140ce215ace808cb3c761e10df93ccb615f194ccc9df15f
font_01_sfnt_off0001738c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1738C 13656 bytes
SHA-256: f4f294aa653881bf8faccce685a1cb0cb57c4b11ba6555c1d721acb0a99dfbd0

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