Malicious PDF — malware analysis report

Static analysis result for SHA-256 64cae7d10cb7887b…

MALICIOUS

PDF

86.2 KB Created: 2021-04-10 10:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 542c8cbd2183e791137b6b5f974c4057 SHA-1: b0bb102f0ee94ae38c8159be3a148f19e9e563a4 SHA-256: 64cae7d10cb7887bdafe25045db0021e38ff7f3e241df37366de228596d095ad
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to a 'fate system toolkit', likely a phishing or scam attempt to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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=fate+system+toolkit+pdf+free In PDF document text
    • https://cdn.sqhk.co/pavetikedur/jc4hhW8/charter_schedule_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/KsigKjj/65519712622.pdfIn PDF document text
    • http://benivosefemiza.medianewsonline.com/98258828286.pdfIn PDF document text
    • https://cdn.sqhk.co/wudajelu/dxiajdb/kpop_music_video_budget.pdfIn PDF document text
    • http://memowelubi.mygamesonline.org/48316024849.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/zaxoruwuxenozunedatovawem.pdfIn PDF document text
    • http://gebikomuxe.getenjoyment.net/45275402848.pdfIn PDF document text
    • https://cdn.sqhk.co/sudidoxa/iNqMigZ/island_biogeography_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/bhc1Wja/nugusidomepazidifaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_e03cb473d14d46a1a0bba512288aa7f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vawoginele/codehs_answers_key_tracey.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/72012549961.pdfIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_ac4f63753ae44ff49de40136bb33a458.pdf?index=trueIn PDF document text
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_e20f302a2c674b0bad1d2853459c1722.pdf?index=trueIn PDF document text
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_e66f60258c1d42cb9d3f37c541ed7066.pdf?index=trueIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_26a04800e05c433facf580c6e369d36a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/40236130698.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/41201645815.pdfIn PDF document text
    • http://gizixaxeviduf.myartsonline.com/13615179420.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/leading_guided_meditation.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/goguz.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/shoprider_streamer_footrest.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/hillsborough_schools_calendar_2020.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_off0001134c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134C 5308 bytes
SHA-256: 272025456003f4477d76f2a3855fa7ad4ad1a7183957f6791e42dc72f2ff3cb6
font_01_sfnt_off00012558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12558 10952 bytes
SHA-256: be83026b312a3f7ff45cc73ecedddbb141b8667f6ce21df88da771ae877e1800

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