Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc05e40f99d077d9…

MALICIOUS

PDF

89.1 KB Created: 2021-03-29 00:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab2a9712f6a493fcfc3eea72ef21fa21 SHA-1: 94814d86e2d564e9dba83955ef09e13bcb7d439c SHA-256: bc05e40f99d077d98350f187112c0642cb3cfd65a2f14da9fd0706d707bc9119
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' containing 30 external PDF links. The embedded document body, though heavily obfuscated, contains text related to 'Keurig b60 reset' and 'wkhtmltopdf', suggesting a lure. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or distributing further malware via the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/aws?utm_term=keurig+b60+reset
    • https://cdn.sqhk.co/wiluxuko/japijDf/78219538001.pdf
    • http://dezimazokuxulil.mygamesonline.org/analista_de_negocios.pdf
    • https://cdn.sqhk.co/worenora/cigIifm/coffin_dance_piano_game_online.pdf
    • https://cdn.sqhk.co/zisubiziwu/gfnHldS/66512235776.pdf
    • http://womizepivilora.sportsontheweb.net/zexibu.pdf
    • https://cdn.sqhk.co/nomelafu/ghiicmS/65175735820.pdf
    • https://cdn.sqhk.co/kuvuzebilet/Scjfhar/rush_hour_2_trailer_german.pdf
    • http://xijulefabogi.getenjoyment.net/agostinho_neto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/11224e14-afb9-4842-9920-685829494df3/36620455185.pdf
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_2ca7045e3ec6406887de6cadc023af24.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d4a07f0d-2216-4103-9bf3-781195a14b08/91301322915.pdf
    • https://0108a07e-94d6-443d-bfa7-575dd38852ad.filesusr.com/ugd/756a01_6e8f15abfc4d452fa0234a5dfcea2dd3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/540bf0c6-4e4a-4c8f-ad4c-aba9277f78d9/minolta_srt_102_price.pdf
    • https://uploads.strikinglycdn.com/files/b76cc84d-8a88-4348-93dc-b771165394b0/rorevijobopizukupapiwixep.pdf
    • https://uploads.strikinglycdn.com/files/80af590b-a5d4-436d-a247-249938e48748/golden_gate_transit_schedule_santa_rosa_to_san_francisco.pdf
    • https://uploads.strikinglycdn.com/files/f65050b4-b229-4db2-b2c4-468a48b569b1/punctuation_test_6th_grade.pdf
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_3d77372bf3514afe91355b42059d063d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4a2eb758-c818-4574-8b0e-31cfa62a2748/code_for_vizio_sound_bar_comcast.pdf
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_68c2a8a8d34443cc894d17d89515a4e8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/55a05c69-8740-458c-91f2-6c6b88a0eb98/xosewibono.pdf
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_a1ebfe0ddb424d57b50bc41da04a483a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d6e74622-8317-44aa-a2e2-eea17bbb2ea6/718247601.pdf
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_b3edde55532641c5a1850b8e324a6375.pdf?index=true
    • https://b47237a6-1880-4d87-9598-f01162bab054.filesusr.com/ugd/1fe0ea_4ab4d945d72943e595f18ffdddc466ea.pdf?index=true
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_4cc36f09b0054bbd9cc6213a5d954e6e.pdf?index=true
    • http://zenakezogutomu.onlinewebshop.net/5052892800.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012155.bin
f53adaa2ba6c8e019c1ef8b61b73678930cc467d6b3277d74bb35eb88a8991b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12155 5016 bytes
font_01_sfnt_off00013287.bin
8581d217ddecca51af13c1534dc9c2413cb6440849bd9e59bd2a62cc117c0614		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13287 10784 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.