Malicious PDF — malware analysis report

Static analysis result for SHA-256 42ca7b6e09398b67…

MALICIOUS

PDF

84.3 KB Created: 2021-03-25 18:26:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 03715a4509be94c3a3a36bff62b5f8b6 SHA-1: 340ca274005cd286a2810b3c6d65ea62973af8cf SHA-256: 42ca7b6e09398b673c244040663fe87b1838fc6c51d36a7b37bc3b9dd2beff3e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The primary malicious URL identified is https://baarspo.ru/strik, which is likely used to redirect users to further malicious content or advertisements.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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/strik?utm_term=power+i+youth+football+playbook+pdf PDF link annotation
    • http://wegafanu.iblogger.org/61303841502.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/433fe9f5-34f7-4077-ab51-dd1c654573ef/29658583120.pdfIn PDF document text
    • https://0aed7b51-d02b-4864-a6bb-b478bb809667.filesusr.com/ugd/fbdaab_f6cf05a9fdee46ccb1f516fd939e30f3.pdf?index=trueIn PDF document text
    • https://50c84cdf-c8d4-407e-a307-361b94491100.filesusr.com/ugd/f2656e_a0f68696ecfc453791c2ddbdf933059e.pdf?index=trueIn PDF document text
    • http://vevenamefod.epizy.com/outline_the_cosmological_argument_for_the_existence_of_god.pdfIn PDF document text
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_89ccbc7f8ec049bc909e53b1e29cf953.pdf?index=trueIn PDF document text
    • http://famuruvif.epizy.com/anjana_songs_ming.pdfIn PDF document text
    • http://moliposapivar.epizy.com/povivuzepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f9b8c6a-6236-41c3-9068-ee3a50438cf1/6314879728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ed1999-8bdf-4fdb-a6f4-96a93d6a15fc/slugterra_journey_to_the_eastern_caverns_part_6.pdfIn PDF document text
    • http://wixesikive.epizy.com/adhyatma_ramayana_marathi.pdfIn PDF document text
    • https://aca292c6-a3ee-4c96-b4c9-db15c8eca1b9.filesusr.com/ugd/cd1d52_28838d932b414e088d456739542cd48d.pdf?index=trueIn PDF document text
    • http://detuzexowo.epizy.com/zikubumapep.pdfIn PDF document text
    • http://xovigogijexivof.epizy.com/ninameroxejivoxat.pdfIn PDF document text
    • http://perabojon.rf.gd/gilinitoketuwajerafen.pdfIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_8f4f43ab8dac47f9aeea1ac9db3048fa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c67349f-d0a8-40af-bf7e-d62e758b0c77/zufuwamedogoxi.pdfIn PDF document text
    • http://sukoxaji.rf.gd/fabudobasatejiridetev.pdfIn PDF document text
    • http://danobefaxejo.rf.gd/all_the_way_up_jay_z.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe51529-3eb2-481d-b787-219d11a40161/99706903638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f68c87-b9e2-4310-a6f0-586b4a379a7e/what_are_the_different_modes_of_heat_transfer.pdfIn PDF document text
    • http://kovusipeduza.epizy.com/physics_for_scientists_and_engineers_giancoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ee1bc2-067d-41e3-b567-383ab8046531/kisipoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fa11b88-3579-4b60-b7d1-d7adbed8d212/90773674873.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_off0000fbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDF 5124 bytes
SHA-256: 648dd4a16ca400c04ff3868bf9b7af41d07c5e88f5acf3f0491292cc0afc1864
font_01_sfnt_off00010d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6E 11156 bytes
SHA-256: cafc70bfb50fc06d958f155573b0b57a9db3e4c6c58b2b901f4e52a32e4cbea4
font_02_sfnt_off0001336a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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