Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62cf9dadbd23a86…

MALICIOUS

PDF

74.3 KB Created: 2021-03-19 12:36:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 98999157d1cef06b4721e27d946dc612 SHA-1: 5f6c3eb0475dff28fb0bb0d3b33e893c59a57436 SHA-256: d62cf9dadbd23a8610a9896d0fe67768f43b5bf6acde77087cdd728ab5f4c9cf
134 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. It contains numerous external links, with one prominent URL pointing to a download keyword search, suggesting a lure for users seeking software. The PDF's structure and the presence of external URIs are consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/wix?keyword=minecraft+pocket+edition+14.0+apk+download PDF link annotation
    • https://sokazavuse.weebly.com/uploads/1/3/1/3/131378988/621a6ea3a1.pdfIn PDF document text
    • https://modotetizifoxi.weebly.com/uploads/1/3/1/6/131637555/29f3503f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403687/normal_600ef015d2312.pdfIn PDF document text
    • http://japamawosoj.mygamesonline.org/algebra_work_word_problems.pdfIn PDF document text
    • http://bu-markett.com/2905317449045u2l.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/triangles_3_exterior_angles_worksheet_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401971/normal_603e1bd59b18f.pdfIn PDF document text
    • https://pefuwopiluja.weebly.com/uploads/1/3/4/5/134592541/vuvojeg.pdfIn PDF document text
    • http://changepass.online/what_is_psychology_in_your_own_words2ify9.pdfIn PDF document text
    • https://vowabogebem.weebly.com/uploads/1/3/0/7/130775978/lililezivemifimuxi.pdfIn PDF document text
    • http://dazavaluk.mygamesonline.org/assertiveness_books.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_6042c383135c3.pdfIn PDF document text
    • https://jefibapo.weebly.com/uploads/1/3/2/7/132712451/dozapefafijakiduwet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c41ddac-3794-4484-b629-2465e4b6dd52/acer_aspire_e15_e5-575g-53vg.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/maths_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/challan_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/rosemary_baby_ending_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f1c300-6ebc-47ab-ae6b-5fc0f1985393/50791000799.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_off0000e4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AA 5444 bytes
SHA-256: 73c06c3660b8d3e38685b1f7d4ea655db9d208c3b3eb2fd3226502b56324dfca
font_01_sfnt_off0000f773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF773 10704 bytes
SHA-256: 53bd60ab8efcbc6a184ea0308759811e72bb8711098b2827aeecc434420632e4

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