Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a24cf1ab210dda…

MALICIOUS

PDF

83.6 KB Created: 2021-03-09 22:02:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 56f3c8c7bbad3c2375ad9f5fdd9ba7d2 SHA-1: d99d531994d27491174df75dbed9a90b1b54db6b SHA-256: b5a24cf1ab210dda900aff882e20c0688d68ccd1dc4777569b27dd943cf20b74
126 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 document body, though partially corrupted, suggests a lure related to a 'Bangladesh bank job circular'. The presence of numerous external URIs, including one pointing to 'ponafet.ru', strongly suggests this PDF is designed to redirect users to phishing or malware distribution sites. No scripts were extracted, but the PDF structure itself likely contains malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/award?keyword=bangladesh+bank+job+circular+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/romilononove/gfmIgh3/71853020237.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/WhkeieB/60554297280.pdfIn PDF document text
    • http://gupupokuvugal.22web.org/avermedia_c875_driver.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/binurakipivoxuse.pdfIn PDF document text
    • http://tetuzat.22web.org/87526942428.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/qjgric0/lebara_customer_service_switzerland.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417406/normal_5fe464876aa91.pdfIn PDF document text
    • https://jisiresofuwidi.weebly.com/uploads/1/3/0/7/130739297/459522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_6044917a723d7.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/how_to_read_anthropology_for_upsc.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/meveropataxovuputoxad.pdfIn PDF document text
    • https://cdn.sqhk.co/gabogivoxavi/iaji3wU/30140575676.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/clasificacion_de_centrales_electricas.pdfIn PDF document text
    • https://cdn.sqhk.co/towafeniruje/yidSjd0/shareit_pc_app_latest_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452834/normal_60264df345778.pdfIn PDF document text
    • https://nofabirudop.weebly.com/uploads/1/3/4/4/134455392/5831483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480590/normal_5fd17ae4bd291.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wewapozolebupo.epizy.com/dark_knight_returns_part_3_movie.pdfIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/magobesewidus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b344a2f4-f7f0-42bd-9b56-f720f1f8b3e3/the_trials_of_apollo_4_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb9f4214-1a97-41e7-8d41-5e480041079f/stihl_robotic_lawn_mower_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de4781d-ee93-4278-8eaa-21ced773761a/tewubusuxusibufetul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0884cb02-b68f-46dc-9b9e-fd5de528f445/mistborn_trilogy_page_count.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcab9bd0-89d8-4484-b6f3-fca647ee1854/jozukemone.pdfIn PDF document text
    • http://wetedezowob.rf.gd/jazidozotefivunilud.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD6 6020 bytes
SHA-256: 6192ef4ce69c7d7473e74804ae17362a7dfdc4ebf2a70cf6f7c2c2fcaea91b52
font_01_sfnt_off0001044f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044F 7460 bytes
SHA-256: bb41a8105123c0554d6fc8c82ea401c3a177e45c3c16d6b6e98b53ec892fda96
font_02_sfnt_off00011cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB2 10268 bytes
SHA-256: c7fe8c742df20a5c5b6bd34db3d164d85fe911caf9224388c9ee668b7679a69d