Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2e214d588c3d4d…

MALICIOUS

PDF

83.0 KB Created: 2021-03-20 22:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c9dc95825d7f8c4ea93c0524d0ca7582 SHA-1: b317acf10751f43e20cc4dc423de47d83630ea94 SHA-256: af2e214d588c3d4d9322f70ea74edcee100ea5f099cef8381df7cb38d03f5aef
136 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an embedded URL that redirects to a suspicious domain, likely intended to trick the user into downloading further malware or visiting a phishing site. No scripts were extracted, but the PDF structure and embedded URI indicate a phishing attempt.

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
  • 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.
  • 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://maypoin.ru/strik?utm_term=how+many+years+do+nimh+batteries+last PDF link annotation
    • http://tranquils.space/zosukaqdgl9.pdfIn PDF document text
    • http://freedate18.xyz/how_much_will_it_cost_to_repair_my_ice_makeryrp0y.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/members_mark_grill_cleanerwczt8.pdfIn PDF document text
    • http://medtechnika1.ru/duvafovexudujetei3gdt.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/examples_of_incrementalism_in_policy_making5ew1g.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/fedure/winchester_model_94ae_value_by_serial_number.pdfIn PDF document text
    • http://dawiwafawuz.epizy.com/affidavit_of_loss_format_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/83420957196.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/change_currency_symbol_google_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fabb1db-5842-4f92-8430-945c9cd38aad/how_to_use_the_bissell_proheat_pet_cleaner.pdfIn PDF document text
    • http://suzogoga.epizy.com/creature_film_full_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8690cd99-cf2a-4928-b775-4cdc5e6342ca/93920079808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac7e5a1-f53b-427b-92d1-5ad47ea54e6c/74584577571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d970522-f5eb-4d2e-8f27-d4b363f331b7/how_much_does_an_illustrator_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba70c656-0bd5-4c2d-8c9f-1b6a9fc64606/70961993604.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/jimedofekavil.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/adobe_illustrator_cc_classroom_in_a_book_lesson_files_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/why_is_tone_important_in_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c58206f8-08a0-4bce-acd8-6f9e45a5f4c5/hoover_floormate_deluxe_hard_floor_cleaner_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f9023d-2d33-41cc-b0b6-1cdf14382989/samsung_scx-4623f_driver_windows_7_64-bit_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c9487d-510e-41f8-ad55-3af7ae923a1e/assassins_creed_valhalla_transcript.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/dim_vba_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/group_4_exam_answer_key_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/influenza_vaccination_guidelines_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404c05d6-940f-499d-ac4c-16190b21872a/el_manifiesto_del_partido_comunista_libro.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_off000105b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B0 5360 bytes
SHA-256: f40a4c92695b93a3f4919c16ee8c1ab00f31924f3f91b6b0b2a7e4f85183c1f3
font_01_sfnt_off000117c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C7 11400 bytes
SHA-256: 1eb146312a294e6a4edd7e38a7b8f70d9ebacfaa8eef2a22879219874de88fca