Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f5e0a80d84022d…

MALICIOUS

PDF

71.6 KB Created: 2021-03-16 09:12:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cb58ddd5a7371327c887930efa8e499a SHA-1: 38f1751de07bf81716a9a8d668b2804ec85730c4 SHA-256: 89f5e0a80d84022d14b173488b4ffbdbc6ca2675ad4a0790e04fe70327c1d6ab
186 Risk Score

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 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 0.9993

Heuristics 6

  • 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 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.
  • 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://nipisod.ru/wix?keyword=palme+pdf+kitap+indir PDF link annotation
    • http://sellamorem.com/what_is_milky_chance_stolen_dance_aboutu3268.pdfIn PDF document text
    • https://dilaxizinis.weebly.com/uploads/1/3/5/9/135973905/tazamufenamos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471996/normal_601b35cb304c4.pdfIn PDF document text
    • https://cdn.sqhk.co/fegozanodedu/jfhilhW/920295406.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391013/normal_5feb0dc32661a.pdfIn PDF document text
    • https://paboripiniw.weebly.com/uploads/1/3/0/7/130739049/duforan-lidajin.pdfIn PDF document text
    • http://shishkin-seed.xyz/moral_of_the_story_one_hour_cleangk8ph.pdfIn PDF document text
    • http://alania365.ru/heterocyclic_chemistry_tl_gilchristxg8et.pdfIn PDF document text
    • http://nncucuucuc.space/monibi4upg6.pdfIn PDF document text
    • https://cdn.sqhk.co/nubokeso/BXBBfhc/62374494890.pdfIn PDF document text
    • http://gprofights.ru/love_story_movies_list_hollywoodmjizv.pdfIn PDF document text
    • https://cdn.sqhk.co/suwixowefa/tNTgjjg/25486839144.pdfIn PDF document text
    • https://kosodakugup.weebly.com/uploads/1/3/4/6/134655388/suvilotoni.pdfIn PDF document text
    • https://kosigejobawazi.weebly.com/uploads/1/3/4/3/134315380/259536c3078bb3a.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/9110046f-d955-4b61-8e24-1c60690c702b/20657729989.pdfIn PDF document text
    • https://9604be5c-c174-4808-8a32-87fcad2dbd79.filesusr.com/ugd/10b03a_e53a7cedcd094775a22edc1d6d1e7df6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8308df3c-255c-47e3-ae71-3c1341bd8f97/2004_dodge_ram_1500_quad_cab_tire_size.pdfIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_c6430ab1c1f2418b9a735fc9be9689cb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e00aa482-6ffc-4713-a301-60bd1090215e/how_to_toilet_train_puppies_quickly.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_9014c950a7b04ed2bb1630a47618474e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c65e409-824e-49b1-ab47-8cfc4705c844/how_much_is_a_hotspot_from_verizon.pdfIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_b900f453223e4044a246088109bbf106.pdf?index=trueIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_4ff9c35b4d9c4ecc89b4bb02032de960.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_off0000d8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C8 5076 bytes
SHA-256: 2777966964da01fb47efcb502eb538698789e9faf5ed9030735ea9e3631f9a54
font_01_sfnt_off0000e9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FA 12604 bytes
SHA-256: 1131552e1d6a6caf5f76af934fc79a02ba2df2a4c1d8552a6fed56923b5201c3