Malicious PDF — malware analysis report

Static analysis result for SHA-256 b87603f66e267c91…

MALICIOUS

PDF

82.7 KB Created: 2021-03-24 19:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7af69ce90c62b55142400618dac4dd5a SHA-1: f3f43315f7b33ba0f7b8c3950ef2b5f036a789b0 SHA-256: b87603f66e267c9186ba7a4d9817778e1037e584db3addf474d382be767a611a
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm and is detected by ClamAV as a phishing trojan. The embedded URL points to a domain that appears to be part of a link farm, likely intended to host phishing content or redirect to malicious sites. The document body, though heavily obfuscated, contains text related to car maintenance, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://fokemale.ru/strik?utm_term=how+to+reset+2007+honda+accord+service+light PDF link annotation
    • https://cdn.sqhk.co/xuwifoviwalo/ghPiRjd/horizontal_joint_flashing.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/zfF0jg8/talion_shadow_of_war_costume.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/MtHheaf/wanutudadod.pdfIn PDF document text
    • https://cdn.sqhk.co/votexeruwiti/jdk9pHz/wizz_air_average_fleet_age.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://uploads.strikinglycdn.com/files/14dc5db0-6a7d-40fe-804a-4553ee2edd8c/tubefitabujuxebu.pdfIn PDF document text
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_15d2fbfef9f94f73b83d1ed10353d935.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/22dd698a-1cf1-43d0-867b-e69e478377c0/columbian_exchange_map_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c62e50f-83ab-4d71-a89c-3df1ef1968dc/38100305103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/390ee96c-cde0-478f-be62-c684e05457be/what_needles_to_buy_for_brother_sewing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d98a08aa-9056-4a2c-83f6-5d32e1458f40/bitisedokamili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f202883b-a4dd-492f-b138-5dde33acf30d/posorilepalejilefatolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8217f485-4428-4d88-ba58-14653cf6a1f2/when_we_use_were_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f54c21-3364-4681-9977-35751db28b8d/fagigofuzomonogatujikaz.pdfIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_333028b8b1c746b7b96560cb062aabdd.pdf?index=trueIn PDF document text
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_21d2b2de14ce45ec815036fce0c49487.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28bb793-e3a9-4bb9-93e3-b56fe4973fe6/redeployment_phil_klay_themes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7305de33-16ec-4a69-a8b6-d1c88044f0eb/paxaminobunipixugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1686746-45fd-41f3-8127-002283b28aa3/lifuzefifodoxumidasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6c0aaa2-5ca7-4e7e-8ae2-788732b92b08/xiviziziwexelatar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/615216d4-8cc2-4b64-8093-bc738af205de/creative_sound_blaster_x-fi_titanium_7.1_pci-e_sound_card_sb0880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/596ed24d-42f9-44c1-8079-ba599f46dedd/bose_sounddock_portable_battery_pack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd3215c-e331-4a67-acc8-27e0a1cc2fda/66168500707.pdfIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_9409fbc488e74aa88d4f94f80b0e14ac.pdf?index=trueIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_ca312000f13d4a37a254f6608c539d36.pdf?index=trueIn 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_off0000f584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF584 5456 bytes
SHA-256: f89b74aa62ae911f8e09faa86ed6979f6acc37040f5db918005a906b3f7ac98e
font_01_sfnt_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 11424 bytes
SHA-256: fa04ab3e05f4ca781393ce012783fadda2f94de6e1e48a5702bd9c1fe0b0671d
font_02_sfnt_off00012f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F23 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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