Malicious PDF — malware analysis report

Static analysis result for SHA-256 9065d1f93e113967…

MALICIOUS

PDF

81.3 KB Created: 2021-06-10 17:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 346bb839fae69be02268267176dfb7ec SHA-1: 1469a1c4f69bf01c148dae1915647461c1bc0bc0 SHA-256: 9065d1f93e11396778dcceac6e82e7d45dfad4610417ac711a4e304a65749d5c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a site related to 'tubidy mobile search engine mp3', suggesting a lure for users seeking media content. The PDF structure and the presence of external URIs indicate an attempt to redirect the user to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://cructi.ru/pbw?utm_term=tubidy+mobile+search+engine+mp3 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500889/normal_5ff623a900741.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410448/normal_5ff16ac75dd0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389820/normal_5ff4d5912f9bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456387/normal_60033fc3a09ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500677/normal_60bfe0f26eac9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487184/normal_604a4f33132a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472221/normal_5ff1d6343b30c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417528/normal_5fd96945dbe21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491669/normal_5fd0dab1204cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kefimazusob.pbworks.com/w/file/fetch/144894702/live_soccer_streaming_free_online.pdfIn PDF document text
    • http://sonopewobu.pbworks.com/f/91318505551.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/f/torif.pdfIn PDF document text
    • http://pajinap.pbworks.com/f/hisense_split_air_conditioner_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00e1334-5360-4301-ba8b-def26cff883e/buvupena.pdfIn PDF document text
    • http://mevuteled.pbworks.com/f/dmx_kids_instagram.pdfIn PDF document text
    • http://rujuboxu.pbworks.com/f/18778326770.pdfIn PDF document text
    • http://ralogotuxa.pbworks.com/w/file/fetch/144781362/how_to_use_my_air_fryer_for_the_first_time.pdfIn PDF document text
    • http://kirozatijawu.pbworks.com/w/file/fetch/144515241/ete_to_vce_converter_online_free.pdfIn PDF document text
    • http://larabefejaji.pbworks.com/f/higgs_report_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c342762-f73f-4d9d-bae8-82f3af9d165a/the_things_they_carried_ap_essay_prompt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba8885c-359b-4507-b88d-464c74c9a497/why_is_my_bose_soundlink_not_playing_music.pdfIn PDF document text
    • http://masigali.pbworks.com/w/file/fetch/144990024/45495880126.pdfIn PDF document text
    • http://bopelijexuf.pbworks.com/w/file/fetch/144618921/zasaluxupamixizuwiv.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/what_is_the_nutritional_value_of_fresh_beets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e312cd14-b337-49ee-8d87-479800334525/john_deere_x320_oil_filter_number.pdfIn PDF document text
    • http://wiliser.pbworks.com/w/file/fetch/144557346/zeluzekotaseluzilum.pdfIn PDF document text
    • http://ruxafonan.pbworks.com/f/descargar_album_de_temerarios.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_off0000fd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD42 5840 bytes
SHA-256: 103db6161dfcaeaab1e86aeec1ba3dd8dc955c163ac06d5bcf08739fd54638ca
font_01_sfnt_off000110fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FE 10688 bytes
SHA-256: b27d12259d9b44cfdb8917c562b5aa4df35c1f84d0665a1f4baf996d5b465ddd