Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab17b48fe849b1a9…

MALICIOUS

PDF

76.3 KB Created: 2021-03-29 18:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6e2a7d2bb5191264d07812c5913fff4 SHA-1: d0c96637de02ee78870b75e26df019310b53cc40 SHA-256: ab17b48fe849b1a9e79e881860e9d315a62887f2f9f731f76a4118c9540bab51
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a site offering 'public speaking skills books pdf', which is a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://maypoin.ru/award?keyword=public+speaking+skills+books+pdf
    • https://cdn.sqhk.co/morureju/9gjSXbq/social_intelligence_test_questions.pdf
    • http://natural-shop.info/final_collection_letter_before_legal_action_template7nw4z.pdf
    • https://cdn-cms.f-static.net/uploads/4369923/normal_602758c55170a.pdf
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5fd1c3fb31d6d.pdf
    • https://cdn-cms.f-static.net/uploads/4416326/normal_603cbbe2845ff.pdf
    • http://dsv-trening.ru/nvs_9th_class_admission_form_2021vccfw.pdf
    • https://cdn-cms.f-static.net/uploads/4367624/normal_6039102710afd.pdf
    • http://detonic-ufficiale.website/6424387060qq2gp.pdf
    • https://cdn.sqhk.co/gidulikegel/RoigJpx/code_metal_slug_3_apk_mod.pdf
    • https://cdn-cms.f-static.net/uploads/4491433/normal_60175a1b8035e.pdf
    • https://static.s123-cdn-static.com/uploads/4388050/normal_60048c1ad4759.pdf
    • https://static.s123-cdn-static.com/uploads/4481520/normal_5ff122ea7260c.pdf
    • https://cdn-cms.f-static.net/uploads/4422620/normal_5fd7b4ec47433.pdf
    • https://cdn-cms.f-static.net/uploads/4418013/normal_6057b02f431fd.pdf
    • https://static.s123-cdn-static.com/uploads/4410194/normal_60026e995c067.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/senodiw/91218832980.pdf
    • https://s3.amazonaws.com/xoferuzu/scotch_laminating_sheets_instructions.pdf
    • https://s3.amazonaws.com/duzexefemosaxe/zunenijolipibaneguvup.pdf
    • https://s3.amazonaws.com/jopomodilamego/lagu_butterfly_korean_song.pdf
    • https://s3.amazonaws.com/jemazejodep/27918627632.pdf
    • https://s3.amazonaws.com/tixedujegibex/tagobuzunaxatagabomadoxo.pdf
    • https://s3.amazonaws.com/liwafo/formation_continue_aefe_madagascar.pdf
    • https://s3.amazonaws.com/safenalavojuwu/visual_basic_string_format_example.pdf
    • https://s3.amazonaws.com/zuwimadaneb/cancionero_catolico_para_misa_letras.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede5.bin
74000a63e85816aac1090f517c558cd00bb4b32afc19babc4b6f37656de7e343		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE5 5432 bytes
font_01_sfnt_off00010071.bin
1f234ecd2110b18c05fcca8e8df8074f67fd5163fd7ba27b882443ae53ee1072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10071 10908 bytes

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