Malicious PDF — malware analysis report

Static analysis result for SHA-256 e273dccdc636b180…

MALICIOUS

PDF

71.4 KB Created: 2021-03-12 19:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c7154b3baab6c4327f6baaa7ad1f8c8c SHA-1: b2376ca0968be840e1f3c5a4ea260a80c66a69ff SHA-256: e273dccdc636b18066bb45db1d413014118d1c74fd4be44ad1d4b61817b02ade
126 Risk Score

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://jottigo.ru/123?utm_term=latest+java+free++for+windows+10 PDF link annotation
    • https://komamizidunip.weebly.com/uploads/1/3/1/4/131437982/34aebd95b8415a3.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/jjb4wH1/powalopuzezu.pdfIn PDF document text
    • http://mikrotikwizard.com/99780653300elks0.pdfIn PDF document text
    • http://shopsmmv.site/fruit_ninja_blender_not_workingvyp0j.pdfIn PDF document text
    • http://forpost-electrica.ru/how_to_send_certified_mail_with_return_receiptcar3z.pdfIn PDF document text
    • https://zutujoxiker.weebly.com/uploads/1/3/0/7/130776667/43763fcfb.pdfIn PDF document text
    • http://salonly.xyz/driven_2018_parents_guidezb0x5.pdfIn PDF document text
    • https://cdn.sqhk.co/pulovafafita/NOifhaL/pexulezutotomifima.pdfIn PDF document text
    • http://creditreportus.info/microsoft_sculpt_comfort_keyboard_and_mouse_manualdf0ce.pdfIn PDF document text
    • http://fizarumokugafu.mywebcommunity.org/virology_textbook_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tikikizeveni/j1jieib/90387455757.pdfIn PDF document text
    • https://wikusujuvi.weebly.com/uploads/1/3/1/4/131406665/9403418.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/M22xhar/xelimomenali.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/64594109335.pdfIn PDF document text
    • http://expo-kit.ru/adobe_photoshop_7._0_free_webforpc._com80wva.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/waxogujev.pdfIn PDF document text
    • http://bostpolamos.site/fesinimopenuhp3yx.pdfIn PDF document text
    • http://scandisvet.ru/85385726731y14uo.pdfIn PDF document text
    • https://gideturifit.weebly.com/uploads/1/3/4/8/134887905/panokadeges_woxerunawidaj_tozitudat_pusodiwesavabes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/germanium_transistor_datasheet.pdfIn PDF document text
    • http://kegigija.atwebpages.com/begubizesosumezuzuda.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/california_dreaming_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/worofe.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_off0000dbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD5 5232 bytes
SHA-256: 38a721955841bc86f16d72e75d28940afd3cf8fc50579c9a7ecc669d67e74e8e
font_01_sfnt_off0000edd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD0 10084 bytes
SHA-256: 201eb352d77f06cdb4ccb4bb6be253f5392f98942d76f5d96ed5b1e27543c83b

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