Malicious PDF — malware analysis report

Static analysis result for SHA-256 a363ede11d00a110…

MALICIOUS

PDF

76.9 KB Created: 2021-03-13 15:54:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9881d6f7a58448a63c9a05ebcdad5971 SHA-1: 0c20da25ea4c4f67ee94f91ccb5487fcf27928d2 SHA-256: a363ede11d00a1102beb0ec0215ab26f5c7ccecb400a0eb1c4e445d5c81ec966
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many hosted on disposable domains, suggests a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'reimbursement form for mileage template', likely a lure to trick users into clicking embedded links that lead to malicious content.

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://resalured.ru/123?utm_term=reimbursement+form+for+mileage+template PDF link annotation
    • https://cdn.sqhk.co/nisugewameru/gighcOL/blocky_fonts_in_word.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/realtek_hd_audio_manager_missing_windows_10_64_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/Ftjg4VH/mepolar.pdfIn PDF document text
    • http://sexesex.site/define_non_programmed_decision16j02.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/vefusuxagofiwu.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/odia_song_2018_video_hd_djwnlah.pdfIn PDF document text
    • http://rawenspant.online/worldview_comparison_chartikes3.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/baby_g_watches_womens.pdfIn PDF document text
    • http://blockingscenery.com/cisco_ccna_security_210_260_free_download0f7yn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366033/normal_600730607949a.pdfIn PDF document text
    • https://cdn.sqhk.co/zexupibo/HAeLgfS/the_cw_2020-_21.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/bLfIxYX/hot_rod_lincoln_song_johnny_cash.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/XgUidgf/xumedikomemudexo.pdfIn PDF document text
    • http://tvoeobrazovanie.fun/sepinuwurazofujesifodor094ru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402938/normal_601bc2a7d20b1.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/texibodabelofenawuresa.pdfIn PDF document text
    • https://cdn.sqhk.co/salozudat/ejiVPQX/gel_nail_ideas_autumn_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_604b4190333f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402000/normal_5fd628c088794.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/xiwevitox/54897333750.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/harry_potter_quiz_questions_and_answers_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/12417650744.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/pendekatan_metaphorical_thinking.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/what_is_knowledge_graph_in_byjus.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/wugewikezo.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_off0000efa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA7 5368 bytes
SHA-256: 1bd02cad24c7da9c8bce9d0582acf40087e0dd34a634a74b3e13c2b0646b1719
font_01_sfnt_off000101d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D4 10068 bytes
SHA-256: 02b01992b897d368d7b38a3b8e744e7e1c62c62c8fd85f3412c4b77d92985a73

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