Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0c621e94e53e7b…

MALICIOUS

PDF

75.5 KB Created: 2021-05-06 09:36:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0d9328400b189bec867ae751955a4c58 SHA-1: 55b8bfaeae7f7c92de843a8bdf52a773d0805e58 SHA-256: 8e0c621e94e53e7b155747d3763d10cabbd2a0f87700c73b83dbd48cd4b261aa
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to exploit users via external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/strik?utm_term=concord%25C3%25A2ncia+b%25C3%25ADblica+significado PDF link annotation
    • https://mosodujisar.weebly.com/uploads/1/3/0/7/130739504/fabojodefipoxavida.pdfIn PDF document text
    • https://dupudebokuvufex.weebly.com/uploads/1/3/2/3/132303235/xisogomi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414495/normal_5fdf624c1bc4d.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/qjcchcx/guvafitejew.pdfIn PDF document text
    • http://supusatode.sportsontheweb.net/a_cuanto_equivale_un_metro_cuadrado.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxedanafowa/jOsjagg/arrow_going_down_gif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_5fd715cd7a3f8.pdfIn PDF document text
    • https://cdn.sqhk.co/jefokejab/iVLc5jb/bed_sheets_l_g.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/atzS7AG/city_sniper_shooter_free_shooting_games_download.pdfIn PDF document text
    • http://tinipen.medianewsonline.com/8421093759.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/ahmad_faraz_poetry_books.pdfIn PDF document text
    • https://cdn.sqhk.co/vekunego/cifIQlW/sniper_movies_list_in_order.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzojivemepe/heNiijh/88697961291.pdfIn PDF document text
    • https://cdn.sqhk.co/sadopore/iXvfDhv/42484207428.pdfIn PDF document text
    • https://kelubipo.weebly.com/uploads/1/3/4/8/134891634/desibed_vutuzofiv_kofadikudu_botovotog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wurunuj.epizy.com/mcdonalds_coupons_februar_2019.pdfIn PDF document text
    • http://bilunijo.epizy.com/hand_held_sheet_metal_flanger.pdfIn PDF document text
    • http://jesitari.epizy.com/48721761982.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_off0000e594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE594 5528 bytes
SHA-256: 908777e62fcaa61dcdd9f3597d73042b36db7b726b9e928166857686ece03907
font_01_sfnt_off0000f7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E7 12976 bytes
SHA-256: 6e6b4c05c0789ade623ec71a1cec4d659fcb21a0ef48274f5c54e80de495bce2

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