Malicious PDF — malware analysis report

Static analysis result for SHA-256 f716f3d12cbeabc7…

MALICIOUS

PDF

75.0 KB Created: 2021-03-09 11:22:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e37f6cdf0a90447e8387949dc2cea5d8 SHA-1: 89eaed17acb5379d39d686e9d4585f10d4ed6350 SHA-256: f716f3d12cbeabc7d5bde312a58d8ed43be0ed3f9922cf4a9630da0f3becc416
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 0.9997

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://gimoguvi.ru/123?utm_term=music+brochure+pdf PDF link annotation
    • http://digosige.mywebcommunity.org/11192161846.pdfIn PDF document text
    • http://lnstagramsecurity.net/lawn_boy_instruction_manual30806.pdfIn PDF document text
    • http://austritkfa.com/what_book_to_read_after_the_hobbit9mvqu.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/where_should_most_of_your_calories_come_from.pdfIn PDF document text
    • http://uscreditinquiry.info/excel_vba_make_hidden_sheet_visible7ojc9.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/46842239195.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/10054908831.pdfIn PDF document text
    • http://xakidofe.sportsontheweb.net/2006_civic_service_light_reset.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://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_5d1f964c797148bd9133df2e99a06c60.pdf?index=trueIn PDF document text
    • http://bitines.myartsonline.com/malachi_z_york_release_date.pdfIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_069982e6d40640989f17b4fb56312f34.pdf?index=trueIn PDF document text
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_e9a3d8154bbd43e9b55c24021b78f2c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/286209e2-e2d5-4fe2-9a5c-98f4fbcc1bd0/77354521759.pdfIn PDF document text
    • http://vasakuzepilaxi.onlinewebshop.net/code_complete_google_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c7bd776-3089-4df2-907a-a27601c7ae7d/rca_voyager_7_16gb_tablet_android_os_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7051a7b5-5589-4f9e-9ada-284328d865b3/tom_henry_master_electrician_exam_questions_and_answers.pdfIn PDF document text
    • https://f867c6cd-7aae-4938-a634-6821dcb48262.filesusr.com/ugd/eb45fa_a4d262c74271484597ace2382c125256.pdf?index=trueIn PDF document text
    • https://421fb4ee-74d7-4aa9-a258-3f705df1d95e.filesusr.com/ugd/94e5ef_7cb748bf70a444c7a7a92223753d0a37.pdf?index=trueIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/11697172007.pdfIn PDF document text
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_256186bce31f4db897abe394f84876be.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_off0000de1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 4840 bytes
SHA-256: 178bc3d709eb525a6ecb63ce7cebbd0ddfc2b87277b98b57f4935b594d52561c
font_01_sfnt_off0000ee98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE98 10036 bytes
SHA-256: 5ff127dc88ca83e3e2bab6f479973836826fdef982871bb2ef55a20bed7bf2a5
font_02_sfnt_off000110fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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