Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b509ad29d96d62…

MALICIOUS

PDF

78.4 KB Created: 2021-03-15 20:25:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3fa76dcedcf4485d9f6791192c08d489 SHA-1: 69fde0cf5007f9295b44cc25c770699225e54780 SHA-256: 35b509ad29d96d6245874c23fc0d71daa5bd2f4da1a3bc906bac4e844d5d1b26
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI that points to a suspicious domain, likely intended to trick the user into downloading further malicious content. ClamAV and ML classifiers strongly indicate maliciousness, and the presence of multiple unknown URLs reinforces this assessment. No scripts were extracted, but the overall pattern suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=totally+incorrect+volume+2+pdf PDF link annotation
    • http://autobaff.xyz/12815707641ykvbw.pdfIn PDF document text
    • http://canonsburglake.com/formal_and_informal_report_writing_definitionvs8zt.pdfIn PDF document text
    • http://mexicotop.xyz/maths_important_formulasn12ah.pdfIn PDF document text
    • http://idealslimitaly-official.site/epson_artisan_710_printer_manualmeh0l.pdfIn PDF document text
    • http://itdiscount.info/93904530347kmtqt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5ffd76c57c47a.pdfIn PDF document text
    • http://clientbluebadge.com/atlante_di_istologia_e_anatomia_microscopica9df10.pdfIn PDF document text
    • http://winoorama.website/parallelogram_worksheet_geometry80lym.pdfIn PDF document text
    • http://hotloveme.online/roland_barthes_5_narrative_codesl6ab6.pdfIn PDF document text
    • http://faceit.su/rulowojodusofevijunojomiwq99rw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387931/normal_603a69d59de48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454180/normal_6047d3b5b4f88.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/fonazuzixagizir/kafovamifi.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/29420438875.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/wabuxirowamol.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/gujogigerusinasu.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/19053562754.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/rofonixuninufazu.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/list_of_bams_college_in_up.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/fijupazukavexatovub.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_off0000f497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF497 5364 bytes
SHA-256: b3ac2e6d251df84cc19a0850edd5808d7e786a415040a20ae986a983294db6e5
font_01_sfnt_off000106d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D6 10932 bytes
SHA-256: 1d1f1d5f7dd89d5b32fe9efa9282db94cb947c5e0c5ec31016e6a93b513571aa

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