Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55fba297c319c99…

MALICIOUS

PDF

72.9 KB Created: 2021-02-25 03:54:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a826c70926f13648d06213b7b6b78364 SHA-1: 6d9e691d14547d17fe5ac5bfb6734e77d642c964 SHA-256: c55fba297c319c99a89fe5b5dd8ce39680b1d0fc931b319be1dc0b523eec200e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://yafferge.ru/strik?utm_term=how+to+change+voicemail+message+on+nec+phone In PDF document text
    • https://static.s123-cdn-static.com/uploads/4373517/normal_60029f8d065df.pdfIn PDF document text
    • http://itawegan.fun/29425219536mo3ov.pdfIn PDF document text
    • http://krokoboko3.xyz/fidomubudujexuvirukunumiivzss.pdfIn PDF document text
    • https://cdn.sqhk.co/livaxipovage/ciajbia/rosobegusanixobarevosubis.pdfIn PDF document text
    • https://cdn.sqhk.co/goxufime/bgfhO7s/super_wings_zebra_plane.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/33373187469.pdfIn PDF document text
    • https://cdn.sqhk.co/xisofofumew/aiuwgdX/escape_alcatraz_game_online.pdfIn PDF document text
    • http://mbfsopg.com/iready_answer_key_8th_gradejrso6.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/zademipoliwivuwifi.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/avatar_comics_imbalance_read_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403428/normal_6016d7211ebca.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/fewunadupop/abecedario_coreano.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/migidatok.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/gavewagimututuveku.pdfIn PDF document text
    • http://zevusup.atwebpages.com/multiple_intelligences_gardner.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/74743343908.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_off0000dfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAA 5364 bytes
SHA-256: 90e103e8bfe922574f3eaab98ee6cd6cfd17641ec6f4a38d4f96b77659690ade
font_01_sfnt_off0000f1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E3 10776 bytes
SHA-256: 70cd4f44dc26b17f059964fac47d6d1b8e65a521af3d39e5b23b4f250b584102

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