Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d17cdb5ccec755…

MALICIOUS

PDF

83.3 KB Created: 2021-04-02 06:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 04797e7058dbee174b8b8efc1354e460 SHA-1: dd9e816ee2d2bc31c326f3b019025693eba30dac SHA-256: 29d17cdb5ccec75535d97c016f22378931212d2dc9bffe9dab999f3382387e2b
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to potentially malicious or disposable domains, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded links are designed to redirect users to external sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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 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.
  • 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/award?keyword=abirami+andhadhi+songs+in+tamil+lyrics+pdf In PDF document text
    • http://wadupobem.iblogger.org/xonulujaxemepibepoxedukib.pdfIn PDF document text
    • http://bamebefexa.22web.org/voveg.pdfIn PDF document text
    • https://navemozozaju.weebly.com/uploads/1/3/1/1/131164567/supufebogas_vubaxofotef_rivifebed_wuxamojuguseki.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/mezatuxudidavoku.pdfIn PDF document text
    • https://nefikeroliv.weebly.com/uploads/1/3/1/4/131453179/2cae338a.pdfIn PDF document text
    • http://jibiduseg.22web.org/what_is_arc_on_yamaha_receiver.pdfIn PDF document text
    • https://xezinaruwi.weebly.com/uploads/1/3/4/4/134479948/acdd73ff69.pdfIn PDF document text
    • https://muzobaxokeze.weebly.com/uploads/1/3/2/6/132682229/pubutuxedom.pdfIn PDF document text
    • http://wepevuj.22web.org/puvepusoki.pdfIn PDF document text
    • https://jujepuwajepoxox.weebly.com/uploads/1/3/4/4/134466337/33b3311bc.pdfIn PDF document text
    • https://boxenujanazikof.weebly.com/uploads/1/3/5/3/135302290/xinadu.pdfIn PDF document text
    • https://koturukumofup.weebly.com/uploads/1/3/4/8/134883222/5c0403b83a6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bilexijo.rf.gd/vodegi.pdfIn PDF document text
    • http://gixisenusadat.rf.gd/vusuwikisovoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51e4f979-1f53-459d-a743-0be8ee20ccd2/craftsman_lt2000_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbbc8d8-2e0e-4d23-ba92-f5d119c5d0b6/the_death_cure_book_chapter_summary.pdfIn PDF document text
    • http://jezuguxefigowi.rf.gd/rudram_chamakam_in_kannada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5eb1fb5-2cf5-405a-a3aa-00da42dabde6/how_to_say_juris_doctor_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49c34181-c5ec-430a-82a2-844784c4e84f/dell_venue_8_pro_5830.pdfIn PDF document text
    • http://wuxofiwuludut.epizy.com/beruson.pdfIn PDF document text
    • http://niselekotoz.myartsonline.com/el_aparato_reproductor_masculino.pdfIn PDF document text
    • http://nixomirorubu.myartsonline.com/web_design_typography_style_guide.pdfIn PDF document text
    • http://mafukifuwu.epizy.com/what_is_movement_in_art_and_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddc2d688-399e-4d71-96e0-f85f168e54a2/vikizifobuvutoxutemukales.pdfIn PDF document text
    • http://kevawiposiwa.rf.gd/use_of_guidelines_in_clinical_practice.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_off000105bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BF 5800 bytes
SHA-256: 6ae3d25e2f4637f4070fb268a85dc5432dde3c95434ced481c3a70fc50b3f606
font_01_sfnt_off0001195a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195A 11112 bytes
SHA-256: 9c18ddef987c4ab802f20de754b4337a39fab62ff5eb3aec707869caf5d33f2f