Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cafafd13905a609…

MALICIOUS

PDF

83.7 KB Created: 2021-03-05 13:56:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 762b2e34ee43a97bf4afbd3538a5d66e SHA-1: 323d52877907b2c640d63923533e2e864abe2143 SHA-256: 2cafafd13905a60938038bcde7565e712aef48fd040256347c3650778bc322ec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/strik?utm_term=game+camera+that+will+send+pictures+to+my+phone PDF link annotation
    • http://loxigedu.iblogger.org/79106029525.pdfIn PDF document text
    • http://zodazaze.22web.org/99245078179.pdfIn PDF document text
    • https://cdn.sqhk.co/fojevimexu/1fheWii/kabesebipeladax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_600bfcff5853d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422372/normal_5fe868ba7bf08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421062/normal_6006d46014520.pdfIn PDF document text
    • https://cdn.sqhk.co/vibesadebo/gh2haNF/electronic_music_production_schools.pdfIn PDF document text
    • http://bunowefutop.22web.org/jetadivig.pdfIn PDF document text
    • https://cdn.sqhk.co/moboguvafuze/jjjiKZc/wyze_app_not_showing_events.pdfIn PDF document text
    • https://kagejiwuj.weebly.com/uploads/1/3/4/0/134095923/9172907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_6013b6615cc5c.pdfIn PDF document text
    • https://nurufumetexode.weebly.com/uploads/1/3/5/3/135323779/xokow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_12d167490d88451d92c5ea9b9a436efc.pdf?index=trueIn PDF document text
    • http://bolilolu.epizy.com/25960360320.pdfIn PDF document text
    • http://rumasujosunux.epizy.com/venous_vascular_malformation_ultrasound.pdfIn PDF document text
    • http://kenakazukigixow.rf.gd/how_to_get_a_publisher_for_childrens_books.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_b61b19198d884ed2bbcb9f33f2587442.pdf?index=trueIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_1a5930596e20488f8e2bc55c1fe44a49.pdf?index=trueIn PDF document text
    • http://xefosilevono.epizy.com/motorola_cls1410_charger_manual.pdfIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_77a70486365e4c2c854bf48aa9861277.pdf?index=trueIn 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_off0001081a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081A 5536 bytes
SHA-256: 87af1f86fca83ba4c3f87cdafecf8099e661cfbdf8cf22277fb054d7526cb6db
font_01_sfnt_off00011adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADC 11252 bytes
SHA-256: 05f3d0956f082bf59d56d472e7befa06aacccd362862cced7c2c2792213b8f6c

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