Malicious PDF — malware analysis report

Static analysis result for SHA-256 321605f8663c4516…

MALICIOUS

PDF

77.4 KB Created: 2021-05-23 20:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 81b92517ecaef4384fa739603a02f3d9 SHA-1: 066e7ef5c3ee9e6af39d36922fd5c1ae4bfd082b SHA-256: 321605f8663c4516982f94b7775ba4951181be423c1a7e026fb1f822ae81c2dc
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=cero+rubias+libro+completo+pdf+descargar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374957/normal_601b9c4ee42c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445107/normal_5fdc59eeaf2f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410989/normal_5fd934a043858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464052/normal_6010977e7cd48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e272ae-35f6-4187-ba18-8d696f36d6ca/model_3_long_range_vs_performance_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/lolitugozizadizidimuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b8ca2fe-14eb-4770-a30f-67d26467797a/spiritual_significance_of_wine_press.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/alta_frequencia_htm_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/sunawaxuzej.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/simple_inventory_sheet_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/vawinijuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d293248-f009-4b52-aeac-fe4012a105ce/wezumajafijegesoso.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/android_developer_jobs_in_mnc_chennai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/330cf773-fe47-4f2c-bed2-dfb8da24d2d7/junalapepapewu.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/zudijotuwaze.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/best_english_grammar_book_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/how_to_remove_wet_dry_vac_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/90886010475.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/rarudaduse.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/jiwusefugazorobis.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/24568082364.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE326 5520 bytes
SHA-256: d95dd66d0a203e52bba21774988aef23a65f57b72190b189987a0c737d39ce89
font_01_sfnt_off0000f5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C4 2012 bytes
SHA-256: ddb7fa5915c1d2cb15519051c34fc8034a15cef1ef25e914fe8592b4a398b242
font_02_sfnt_off0000ff6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6D 11968 bytes
SHA-256: 36dc2fb58a87b0243d0a41768c363b1f02d221cbc158af7addd3f70849ebce9d

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