Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f19edda49fb8020…

MALICIOUS

PDF

84.4 KB Created: 2021-06-10 02:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7a08018bd5b9f1bd7df2eb6138c8f488 SHA-1: ba05eb7a093312a88e25e1cc050ce7abbd534d87 SHA-256: 8f19edda49fb80204efcd64121aa17addc86202903ab9cc17cd199139e7fa40b
134 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The presence of external URIs and a 'download button' heuristic suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a malicious document designed to trick users into visiting external sites, potentially for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 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.
  • 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://garglob.ru/pbw?utm_term=rrb+je+previous+question+papers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475734/normal_5ff8d937e5c84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527237/normal_60027464ec9ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_6064f73073f9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417222/normal_60598d7138ace.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4424027/normal_60b60b65b8670.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/134a9522-fd8a-498c-9c69-a1bd4147f479/pedadazeponepum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96cf59d7-1aa7-4bea-9529-b6a2a02d140c/big_little_lies_season_2_episode_7_ending_song.pdfIn PDF document text
    • http://bazibenis.pbworks.com/f/58781816518.pdfIn PDF document text
    • http://kigijujozi.pbworks.com/w/file/fetch/144708111/ethernet_cable_color_code_poe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea36296-0193-46d1-9766-9034963a49d8/tubemate_youtube_video_downloader_free_download.pdfIn PDF document text
    • http://kopiginawavu.pbworks.com/f/fuvinibijenugusag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ad74bc-0575-4e1f-b93a-8e20eed519fd/financial_accounting_10th_edition_hoggett.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2ac5819-ffce-48cf-9542-32863f64cfa7/4822804840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/445cac41-b660-4dc9-ab85-2fd3fb8a3c96/margaritaville_key_west_frozen_concoction_maker_with_auto_or_manual_shave_and_blend.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9526ce3-615a-4a0a-8221-4850004d23ea/what_over_the_counter_drugs_can_lower_your_blood_pressure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/973c074c-4f57-4f19-8ba4-1280432f5fc0/pl_sql_tutorial.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/f/27989030714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b5bb8c-f2ed-4c3b-ab2d-f9a773e2df11/why_is_my_shark_steamer_not_steaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4ea86d-96ec-42ae-8e5f-e3513121aafb/jikoledase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46e0f828-3e0a-443d-b33b-eb48bee58509/what_to_say_in_a_letter_to_the_parole_board.pdfIn PDF document text
    • http://lodenapokot.pbworks.com/f/83810380736.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/w/file/fetch/144457818/laderijupekevevuzubobidam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020271cc-ffdb-430a-b555-f658cc4cb361/maytag_bravos_xl_washer_complaints.pdfIn PDF document text
    • http://vogituvu.pbworks.com/f/caselet_di_for_clerk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c41077-0578-4f5a-9916-5908d06a0e22/biblia_de_estudio_plenitud_gratis.pdfIn PDF document text
    • http://wefolevemud.pbworks.com/w/file/fetch/144478089/the_norton_anthology_of_english_literature_9th_edition_ebook.pdfIn PDF document text
    • http://palejemevat.pbworks.com/f/does_the_amazon_echo_dot_3rd_generation_have_a_battery.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_off00010012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10012 5072 bytes
SHA-256: 35f2cf40c63c20164bfd5985f8e69dd7a46c87c5fc7ccb96ab3d621044f3ac94
font_01_sfnt_off00011170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11170 10692 bytes
SHA-256: 773a851c9fbe6dafe4c6cc73ff57c92594a72cca0bffc5c2f26a6fa7ca26c538
font_02_sfnt_off000135e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333