Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc2fc9d3d0c9cf0…

MALICIOUS

PDF

67.7 KB Created: 2021-04-02 19:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dd28c4dcbf21cdb5b5eb043f43b0883d SHA-1: 50ab458f2104c458fae42dff5ca510e8b81b0343 SHA-256: 6bc2fc9d3d0c9cf01b5fa42881c341311965e0524fb3bdde250b65e05a0cdbb8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=unit+9+level+d+vocab+answers PDF link annotation
    • http://wownatural.fun/alibaba_app_for_windows_104tunk.pdfIn PDF document text
    • http://montana-media.com/kumarizukepugewofujal57xn.pdfIn PDF document text
    • http://orehi-siberian-force.online/shark_ion_robot_vacuum_r76_reviewyafad.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/1igiiiH/retunaji.pdfIn PDF document text
    • http://summ-ita.space/tipos_de_palabras_simples_compuestas_derivadas_y_parasinteticasefhrx.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/1idDIdd/black_panther_comic_book.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/jbicdXa/mojojofoni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485004/normal_5ffdf153a0205.pdfIn PDF document text
    • http://e-devletodeme.net/lelexoragudilazunefmkfg.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/2JarKG4/59375914667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481527/normal_600ec173b5b23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_5fd9f3f28c6c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485693/normal_5fd66fbc06661.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb8bfaa-2ff5-4130-9636-270b1aab26a1/kereto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c77eb1-5c2a-408b-a0ba-fad13ca45a51/suzopipowujujit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88f7e69-02a2-4ce8-86f0-e6bfb12c2f2c/cva_wolf_muzzleloader_load_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f7bba45-2c3f-41f5-adf0-fab7776ac362/sanasaloxufaxejipisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05eec63a-71ae-4765-a727-1dfd06df0551/devevofufofijawik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6adf7181-d342-4874-9550-9f554a50882a/tonawifakarejajufajavowos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fa8cc9-5674-4963-bace-684f86ac91f1/mebel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6c440bf-d25f-437c-b973-cac63e5c77f3/will_there_be_another_how_to_train_your_dragon_homecoming_on_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b12b9c4-39f5-4c94-83a7-039d0a94e703/fuzazumefofapes.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_off0000ccff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFF 5372 bytes
SHA-256: dc4b3f2e831f03bf3f135c37b15e7c33dd244bbe93c2d0a741c5536a9562927b
font_01_sfnt_off0000df65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF65 9948 bytes
SHA-256: 45aba7b846dfea2849ff80785306fb822ab982c1ce47b831d0db5e83bac10bbf

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