Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c98d859d658ccc…

MALICIOUS

PDF

70.8 KB Created: 2021-06-10 16:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c9d612bbf420c6705c45691f4df347bc SHA-1: 056691cdfc1c562c41ac75a7776161a9b7cb78fd SHA-256: 08c98d859d658cccec55a01c5d520039ac3bca0460fc8ad86a903a0fe966a918
144 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a redirector URL associated with a 'free-download phishing' lure suggests an attempt to trick users into downloading further malicious content. Although no scripts were extracted, the PDF structure and heuristics point towards an attack pattern involving social engineering to facilitate malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/pbw?utm_term=fifty+shades+of+grey+free+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460231/normal_604741543a217.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4476943/normal_60b566bc318ec.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/c4342adc-bc30-46f9-8d5a-a1e15fc1df0a/who_is_the_best_clay_court_tennis_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a1f1c9c-0939-444c-a40a-77c6c0b85434/samsung_galaxy_s9_plus_case_with_screen_protector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a3b950-9e8b-4265-9368-f6455da88d62/vosufomebijagadoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd7ee76-5c2f-4a2f-a44a-083fae0fbbf9/bavedazetuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e98a37-739d-4512-bc09-4339be590a43/46363906908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe88a413-3fab-4dda-b2de-e9f0f6ea0ccf/tg862g_ct_ip_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59fa2a3e-4d41-435e-a83b-ba5d1b97412f/vukemajuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba22744-223c-43a0-b0ed-b835dd7e5852/zidakijegon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/462f3ae3-4ed2-484d-beb7-426b3494a0bb/21528600582.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/w/file/fetch/144657936/how_to_add_dstv_now_on_lg_smart_tv.pdfIn PDF document text
    • http://vesenimu.pbworks.com/w/file/fetch/144962979/download_cheat_car_parking.pdfIn PDF document text
    • http://zuwuzemoj.pbworks.com/w/file/fetch/144801285/57828177284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c87799ee-6d08-44d1-a634-82b6acd1a241/4_types_of_secondary_manufacturing_processes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d484e9-6cbc-4a59-8386-316913c91eef/bergeys_ford_north_bethlehem_pike_spring_house_pa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2062433d-0827-4c62-92aa-b394630baef9/what_is_direct_material_variance_in_cost_accounting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/709fabdd-737a-42cc-86d6-f97389b3df12/honeywell_quietset_40w.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e4860c-b7ef-49c1-9996-9d8bfd6690f1/82365704845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1c5e550-79f0-4ed3-b1da-845f5fde757a/english_speaking_book_in_gujarati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57db68cd-1b8c-404f-8bf0-ce26abff224a/why_is_brown_v_board_of_education_important_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e788d3e-4f4c-4858-b2a4-4bcb313fe13e/dewalt_pressure_washer_operation.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_off0000d7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E1 5408 bytes
SHA-256: ab068372880112700949ba87155318460a0affaebbefbabe4c4a0157d34894cb
font_01_sfnt_off0000ea33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 10444 bytes
SHA-256: 9b482dbf8855ab858e43ce99036daaabbc4cb918ec4d997f7db298123bc4ae20