Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe82e08e12b27d39…

MALICIOUS

PDF

98.8 KB Created: 2021-03-01 21:01:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 19e05eed0eec0b6175fc675fa94eb8a6 SHA-1: 0a808274e0cbce0b6d20d0907ffc3fec65a89fea SHA-256: fe82e08e12b27d390b002a0534e229d3cf1dca3fece224ff83367b67e02573f2
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical detection for a link farm and a high-confidence ML classification. The presence of numerous external URLs, particularly those pointing to Weebly and other free hosting services, suggests an attempt to redirect users to potentially malicious content or to manipulate search engine rankings. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely involving phishing or the delivery of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/123?utm_term=richard+ii+shakespeare+characters PDF link annotation
    • https://kasitawudak.weebly.com/uploads/1/3/1/3/131380619/funabisarepugen.pdfIn PDF document text
    • https://doxuxipineza.weebly.com/uploads/1/3/0/7/130740192/goxenofe_xezusiko_gexegixuwosisu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469640/normal_5ffd832d21843.pdfIn PDF document text
    • http://pakawuwujawo.getenjoyment.net/ted_talk_discomfort_is_the_price_of_admission_to_a_meaningful_life.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzixije/hgig2ia/wonder_slot_machines_free_casino_with_bonus_rounds.pdfIn PDF document text
    • https://pepadamive.weebly.com/uploads/1/3/4/4/134468065/3849416.pdfIn PDF document text
    • https://jumuwaxenu.weebly.com/uploads/1/3/1/4/131406560/8150c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418167/normal_5fcb15e6e3d1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479254/normal_60302f18d220a.pdfIn PDF document text
    • https://cdn.sqhk.co/sazobenapur/X6DAphf/4104054278.pdfIn PDF document text
    • https://cdn.sqhk.co/vimanagadu/bdAgeia/mawap.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://s3.amazonaws.com/jejulurowev/10653733233.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/zabubamez.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/82519565308.pdfIn PDF document text
    • http://bitujiduruv.myartsonline.com/68013087544.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/esl_worksheets_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/rikugo.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/visual_studio_code_emmet_cheat_sheet.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/red_dead_redemption_playstation_3_walkthrough.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_off00013a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A75 4772 bytes
SHA-256: 76647d2228ff9307bc6e8e9cb9038f24f019f4c4e9a5c6cd2d9815bc6cd9262e
font_01_sfnt_off00014ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AB9 10796 bytes
SHA-256: 86ac5ba9f172e81194e103e72ecb0bfbe40b0787e5f02d173c2c4ce83f1fde0c
font_02_sfnt_off00016f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F93 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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