Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc07fa92c83bffd…

MALICIOUS

PDF

117.2 KB Created: 2021-03-13 12:53:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c797e3fb16b89c339795d02c7c7781f8 SHA-1: 191d6ba0bf3b63210422e49ea12f683add91dc2b SHA-256: bfc07fa92c83bffd9e1ba17c0e38d90e0711159d8ca041310e3b46a66a65cc87
146 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The 'SE_CALLBACK_LURE' heuristic suggests a pretext for user interaction, likely to facilitate the download of a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://seumenha.ru/award?keyword=linkedin+profile+optimization+for+dummies+pdf PDF link annotation
    • http://xamoxipuwizutux.scienceontheweb.net/how_to_connect_beats_powerbeats_3_to_laptop.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/22652764052.pdfIn PDF document text
    • http://good-production9.site/spanish_learning_programs_in_spainhpttq.pdfIn PDF document text
    • https://kimexigute.weebly.com/uploads/1/3/4/0/134017587/bodaxor-vasoruguzoga-mebomizemon-zivada.pdfIn PDF document text
    • https://nunevebola.weebly.com/uploads/1/3/4/8/134846747/058020cb4c4.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/wendys_small_frosty_ingredients.pdfIn PDF document text
    • http://samyog.ru/wifujuzimasojefavotefaum3hf.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/debawuvevudiliseji.pdfIn PDF document text
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/favado.pdfIn PDF document text
    • https://rofixuninapo.weebly.com/uploads/1/3/5/3/135313709/dezokolixuwefi.pdfIn PDF document text
    • http://fuvidevifa.scienceontheweb.net/writing_skills_book.pdfIn PDF document text
    • http://timecodes.net/module_6._1_leaping_lizards_answer_keyqy2gb.pdfIn PDF document text
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/8df1b1a1a407.pdfIn PDF document text
    • http://unityfree.xyz/face_changer_camera_apk_downloadj6nfw.pdfIn PDF document text
    • http://sovolox.getenjoyment.net/contesting_a_will_solicitors_near_me.pdfIn PDF document text
    • http://khareedforosh.com/android_programming_the_big_nerd_ranch_guide_3rd_edition_epubdcs7w.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
    • http://xobibaga.myartsonline.com/quais_so_os_tipos_de_linguagem_na_filosofia.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/angular_6_file_from_server.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/code_vein_gift_guide.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_off00017bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BDD 5124 bytes
SHA-256: 60143ba673957c0b2007b666a7ae6f9f1b136aa15608de5f9d63ff1cb00ec8ad
font_01_sfnt_off00018d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D32 12656 bytes
SHA-256: 4ae26618658c94e72eeea42712a50378aca44f7362d45042e8751f27006448ec
font_02_sfnt_off0001b7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7A5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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