Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f89e28d3d7b653d…

MALICIOUS

PDF

91.2 KB Created: 2021-03-09 01:30:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 05c36abbea96dacd54d177345146be2f SHA-1: a285e7f3b8b647a6682c8384299cd9ba7f92dee3 SHA-256: 6f89e28d3d7b653d33a78ba484c52f16c7cc4263a5285fbc5c4ae9d6c5d650e2
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically linking to a search result for a PDF download, indicating a lure for phishing or scam content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://bologen.ru/award?keyword=tulja+bhavani+stotra+pdf+download PDF link annotation
    • https://cdn.sqhk.co/geroterunetu/tGjdgdU/binolubobisof.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/85429651721.pdfIn PDF document text
    • https://xidoferowugefu.weebly.com/uploads/1/3/4/3/134348033/1d9e0d33ee.pdfIn PDF document text
    • http://megantv.site/the_secret_book_treasure_hunt81p5j.pdfIn PDF document text
    • https://zinibikilejob.weebly.com/uploads/1/3/4/8/134886520/c6717acd58.pdfIn PDF document text
    • https://cdn.sqhk.co/gunakawujo/IQXA3gh/69858055328.pdfIn PDF document text
    • http://alcexpress1.xyz/what_do_bombas_socks_costmunij.pdfIn PDF document text
    • http://educationonline.website/229215878703csll.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/MlQrig7/classic_motorcycle_race_bikes_for_sale.pdfIn PDF document text
    • http://winclean-shop.space/que_es_el_control_de_calidad_totalfv9aq.pdfIn PDF document text
    • https://cdn.sqhk.co/buwaxaxodi/fhgujfG/scrap_copper_prices_per_pound_in_georgia.pdfIn PDF document text
    • https://monemoret.weebly.com/uploads/1/3/4/6/134667898/3996203.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/bv0gjap/40371925942.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b2cffe-0361-4bd5-a5ce-07fbe3c9802d/18286609213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad35a9d-3874-4d08-80df-ce76a9b940e6/how_to_write_a_professional_resume_and_cover_letter.pdfIn PDF document text
    • http://galupubusimoge.rf.gd/fonozuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc7720d-98a8-4f3a-8a49-d492ffceb708/lidedaxidigelomofog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b1518f-14b1-446f-ba42-c3505709a5aa/jabakigadiduki.pdfIn PDF document text
    • http://kevusej.epizy.com/anxiety_treatment_guidelines_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb90264e-4435-448e-bdcc-a775d6e984f0/how_to_pass_nc_driving_test.pdfIn PDF document text
    • http://wowupopokidejol.rf.gd/what_are_the_techniques_of_persuasion.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/ejemplos_de_dialogos_cortos_para_nios.pdfIn PDF document text
    • http://kudadurazeze.rf.gd/convertir_pulgadas_cuadradas_a_centimetros_cuadrados.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/xuroluneza.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 5448 bytes
SHA-256: 1358de8fd5e1c2456492ba0885fccc60056230f068b249c2e146e50995b78fca
font_01_sfnt_off000107d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D5 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00011338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11338 14900 bytes
SHA-256: 5bb9da1ec045376c2dcd7c5cb885015287aa74479435cfab85d5576328bc017e
font_03_sfnt_off00014204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14204 7816 bytes
SHA-256: e2c2bac3d2a076b60aa80c2a71ae3a5b04840b3570d1207ae74965de08407a4c