Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00c8f57807895f3…

MALICIOUS

PDF

83.6 KB Created: 2021-04-05 14:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9b8c3bd21d4fe17fd27c866f22001ac1 SHA-1: 001cf2fa1f0136d9ccafbbb1f43bdda1a6ed5269 SHA-256: f00c8f57807895f3f1ce50bef0086009081856e8f01316126f0ed3bee85ac05f
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 0.9996

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://zajinet.ru/123?utm_term=avira+android+apk+free PDF link annotation
    • http://fijubigatusurov.scienceontheweb.net/how_to_change_the_battery_in_my_g_shock_watch.pdfIn PDF document text
    • http://50offstore.pro/what_is_the_most_effective_bleaching_creamre4om.pdfIn PDF document text
    • http://betflixguvenilirmi.com/motikudud57i88.pdfIn PDF document text
    • http://modarab.mygamesonline.org/isaiah_berlin.pdfIn PDF document text
    • http://luxisulejoxo.getenjoyment.net/automatisme_industriel_livre.pdfIn PDF document text
    • http://skameyki.club/kowepolakisuzapevilimopae41c3.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/1037345837.pdfIn PDF document text
    • http://popegajinetulez.iblogger.org/agrostology_books.pdfIn PDF document text
    • http://it50save.info/el_alquimista_free_downloadp211s.pdfIn PDF document text
    • http://sfr-webmail.com/mugolukoduvuxufenizu2akq5.pdfIn PDF document text
    • http://jarokixepoweso.mypressonline.com/44021521342.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/481514f2-fe07-4680-84e7-cdf971beff70/brother_mfc_7340_toner_singapore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76420951-a751-4b42-b66b-a7a2408f2906/z_for_zachariah_ending.pdfIn PDF document text
    • http://zeborerafo.rf.gd/triangulos_del_cuello_anatomia.pdfIn PDF document text
    • http://ravojovi.epizy.com/2nd_grade_math_multiplication_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55aa2264-558b-4acc-a981-7de921d46c9a/lagotaravogamuwufero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59fec63a-c15a-40b3-a938-5c6301b3041c/netgear_wifi_router_r6330_-_ac1600_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fadc3bd8-e65f-4c96-bfd7-05c75146a986/jenkins_.net_core_code_coverage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50630a9-6f0a-41ac-95f5-1964d404545c/is_a_sensory_processing_disorder_considered_a_disability.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/785aa14f-4b63-45db-a943-0db2424a6178/devoxeros.pdfIn PDF document text
    • http://xakagigoneliv.myartsonline.com/cours_anglais_pour_les_debutants.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_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 4648 bytes
SHA-256: 33a9290a2ab443fdcdd46e9c712ed666971a7ba23d2137f61e4fd6901748d625
font_01_sfnt_off0000feae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAE 22444 bytes
SHA-256: c4f3e61a8639a49a8dbfb0ef6e5418bfc7b6a6890bdbdb7b23f971b7f6167788
font_02_sfnt_off0001313a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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