Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc551c7dfe3fd86…

MALICIOUS

PDF

79.9 KB Created: 2021-03-06 01:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 06e1bd8bb8feeac2150ef3ae111552e5 SHA-1: 6476a1dbadc3160c889512249e0a4093235b6445 SHA-256: dbc551c7dfe3fd86849881896c254feed15493a4b56b5a9dd4f00a60049623ed
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/wix?keyword=hunter+99122+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478408/normal_6022ebf38f46d.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/find_the_closest_dunkin_donuts_to_my_location.pdfIn PDF document text
    • http://fabermanufacture.ru/java._net._socketexception_connection_reset_android_retrofitweqf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393018/normal_5fe6ffe282e9e.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/how_to_use_crane_drop_humidifier.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/how_come_when_i_look_up_my_head_hurts.pdfIn PDF document text
    • http://ubzvp.com/diafragma_definicion_medica5l7im.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486354/normal_5ffd092b66241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481068/normal_6018cf8913db2.pdfIn PDF document text
    • http://magic-spring.com/what_does_the_word_tempest-tossed_mean_in_englishbj7f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387807/normal_60310fccb11c8.pdfIn PDF document text
    • http://sesalon.xyz/tezetaf1z9u.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://s3.amazonaws.com/tapelu/how_long_is_harry_potter_5_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/legadoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda34805-e127-421c-844a-1afb67202782/how_to_adjust_time_casio_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88161847-bd68-47ed-8e42-c25708e6bbf5/ham_radio_deluxe_apple_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f3da96-c30e-4c62-918f-9b07797c6246/what_are_2_benefits_of_glycolysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb099ae-dc3e-404d-b7d5-9f34d0a634c2/honda_inverter_eu2000i_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3d1eeae-46e7-4d1d-a45d-c296e0d83d81/jayco_owners_club_act.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/not_fade_away_tab_buddy_holly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae95cc77-89a0-4d64-86f7-542d60f0a735/glacier_bay_faucet_parts_lowes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b22ad4fd-d889-44e1-9517-652c661c01e2/a_christmas_carol_charles_dickens_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/jemoregosuxuluwewelekamol.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_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 4680 bytes
SHA-256: 731c8393b7f008fecc14272507e0b0a98cbb6000cd82831997d9622441c8ea8c
font_01_sfnt_off00010069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10069 10532 bytes
SHA-256: c868e244b693c28b3200971b243d5c8c4b2fa0491a6d21d79e365dd588981555
font_02_sfnt_off00012441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12441 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2