Malicious PDF — malware analysis report

Static analysis result for SHA-256 df90c24a78ba202c…

MALICIOUS

PDF

90.8 KB Created: 2021-04-04 21:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1809749b9634460ef052dc181883eee1 SHA-1: 32d3de1409782afa7d31e0c2deb422d1067f86ac SHA-256: df90c24a78ba202c09d904eedb0b65311c55780d705eed1db6fd08ab0bf2a4f7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest it's designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/award?keyword=yoruba+traditional+burial+rites+pdf In PDF document text
    • http://lukiduxipapep.mywebcommunity.org/rorarigazigakefebidupe.pdfIn PDF document text
    • https://cdn.sqhk.co/nonebizi/hgkC9sQ/boo_2_a_madea_halloween_cast.pdfIn PDF document text
    • http://ita-yog.space/nubed2tw9t.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/g1DoRih/nunigoxifagagilagusi.pdfIn PDF document text
    • http://vizazovabula.mywebcommunity.org/88580635854.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/free_california_rental_agreement_2020.pdfIn PDF document text
    • http://xuritepizib.mygamesonline.org/atcc_bacterial_culture_guide.pdfIn PDF document text
    • http://catsism.com/36906582863fzqr6.pdfIn PDF document text
    • http://rekijiwowak.scienceontheweb.net/coil_ignition_system.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/aws_certified_solutions_architect_2020_practice_questions.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/winemigogofemilemulim.pdfIn PDF document text
    • http://life-news.tech/new_bollywood_movie_hd_free_2018cphge.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/bsc_1st_year_zoology_notes_2020.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/niporofez/etude_de_la_cellule_animale.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/the_red_hand_of_doom_review.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/english_language_proficiency_standards_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/zekafutivofazowolukatilug.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/destiny_child_apk_obb.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/18845008920.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/blackest_night_tome_1.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/bopemaxewuvimegalasog.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_off000124e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E8 5136 bytes
SHA-256: 790db3be812ce7c45ecfea32864f0734c90ceb01046d1257420f320aac3aa5ce
font_01_sfnt_off00013667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13667 12864 bytes
SHA-256: 07d149b61f99eb78f21ef2a6252e4e8262cced22e01242a118294483edb85538

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