Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaba9533a56a4f38…

MALICIOUS

PDF

84.4 KB Created: 2021-03-08 05:32:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c6733c38e7c7cac5d22c368e32fa9c73 SHA-1: 27d177c467d8d978e2817278150b555f9e959d85 SHA-256: aaba9533a56a4f3849cfa663a2dcb761040f824e931aca74b637e493dd833662
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to instruction manuals, likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://kuzutuzo.ru/wix?keyword=honeywell+chronotherm+iv+plus+instruction+manual PDF link annotation
    • https://cdn.sqhk.co/fupokonabat/iaNGRmh/zegupaj.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvopone/jhghehi/lokicraft_game_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/fbbhdhf/fnaf_party_music_roblox_id.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/0gdibUQ/55310535667.pdfIn PDF document text
    • http://mabay.fun/whirlpool_owners_manuals_onlineukbhr.pdfIn PDF document text
    • http://erse.xyz/bach_lute_suites_for_guitarmrvyf.pdfIn PDF document text
    • http://wekeb.space/sovedafiwefakum8hbye.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/jijfOha/67425013540.pdfIn PDF document text
    • http://ketotreno.buzz/how_to_find_wps_pin_on_lg_phonefs0ud.pdfIn PDF document text
    • http://cabinetsly.xyz/ironman_marrakech_athlete_guide6gfio.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/hbcgcOR/xojiwunuzokipa.pdfIn PDF document text
    • https://cdn.sqhk.co/giripiponi/hcjihde/horse_running_speed_km.pdfIn PDF document text
    • https://cdn.sqhk.co/vorinugobol/9njiyxa/ratesotoxav.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/gfoiegd/lefegususifo.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/tuzamada/sazebupazerujamivazowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d936483b-558b-4798-a2e3-f67bda6c0c35/49342497574.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/beautiful_love_quotes_in_telugu_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e89083-feba-4df2-935e-8311ed02b6e5/altered_carbon_season_2_episode_1_end_credits_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/botany_practical_book_class_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0921edb-21a8-4f4e-8943-dc40c9aefd47/navy_fitrep_opening_and_closing_statements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e94a1e8-553f-4ef6-a530-282f6bfb888f/simple_interest_sums_for_class_7_icse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b222a35-9708-4e1a-9a92-ced53f178609/gonopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738e1f8f-7177-45c3-8a78-5d31f34fd78b/how_to_pair_plantronics_headset_to_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19635c71-ceda-4d10-adab-9b316b40c0e6/mizanodovefojewoluzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7969b58a-e12f-4de2-bc93-98f6beedd502/free_printable_multiplication_arrays_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/geboxabira.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000117c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x117C9 23304 bytes
SHA-256: 84ded29ff15bbfedfebd8ba5578c22b82fa041412c70bf4a191cb8080763ac5c
font_00_sfnt_off0000d89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89E 5388 bytes
SHA-256: 408ad6977109d997e9a287866310df45133bdb16261b000602f632cf13930f3b
font_01_sfnt_off0000eadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADF 14320 bytes
SHA-256: cda62f886ec6f7b052bd91f4f5a97f47940afbc62ca1d962e7def60a06f9ba87