Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbaed434ce399939…

MALICIOUS

PDF

76.1 KB Created: 2021-03-29 02:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 82258e22a2b86bcdd436a9a8787cd1de SHA-1: 28c11f787ce4f82bc4bbc0fe5692469e86ae5732 SHA-256: fbaed434ce399939c199a58e7bc237eca6a29786c38bd91a3638a78d1683cde5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the primary one leading to a URL that appears to be part of a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://pelibifir.ru/award?keyword=amazing+facts+about+the+universe+pdf PDF link annotation
    • https://zuligaxexepe.weebly.com/uploads/1/3/0/7/130775912/2927738.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/FDjhXjj/radio_fm_104._7_en_vivo.pdfIn PDF document text
    • https://nujuwededewomoj.weebly.com/uploads/1/3/4/3/134305400/tujotegovanitik.pdfIn PDF document text
    • https://xupugafowepeg.weebly.com/uploads/1/3/0/8/130814457/b1d14352b.pdfIn PDF document text
    • https://kofasarafafe.weebly.com/uploads/1/3/5/3/135390193/c1236c5eb.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/5Nigijh/41297501295.pdfIn PDF document text
    • https://runuxufugax.weebly.com/uploads/1/3/0/9/130969308/8279770.pdfIn PDF document text
    • https://zuxogujuwikowe.weebly.com/uploads/1/3/0/9/130969390/9035377.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/bgiPShc/jegopinamepojetimaxepexi.pdfIn PDF document text
    • https://vasuwogi.weebly.com/uploads/1/3/4/0/134017955/a4248.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/haIhfm1/space_shuttle_simulator_free_mod.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://uploads.strikinglycdn.com/files/14ed8cd9-aaaf-43b7-b528-6fe69c817c69/gmat_preparation_time_required.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43488814-f680-4fc3-8aff-de621298d96f/xasetejoge.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/persona_4_boss_guide_gamefaqs.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/benign_intracranial_hypertension_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/26633778378.pdfIn PDF document text
    • http://samowegepor.rf.gd/interpreting_line_graphs_worksheet.pdfIn PDF document text
    • http://rujolur.rf.gd/xemivuduvolutuxofovoziwux.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/tarefatuxarafabumu.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/apple_nano_6th_generation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/244ae870-7326-4be4-96ff-70c33218eab0/wexoxijojezujofagod.pdfIn PDF document text
    • http://tovimemiluv.epizy.com/pezakawusubeg.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_off0000ded7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED7 5660 bytes
SHA-256: d25539aeec14f54b98a7a2b0c62c873436f7806747ee623d31ab4d2330184df9
font_01_sfnt_off0000f1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E9 10316 bytes
SHA-256: 8e20e52391bb566cfde670fcadc55838834180257298d3e9524f67bed61c5a4c
font_02_sfnt_off00011517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11517 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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