Malicious PDF — malware analysis report

Static analysis result for SHA-256 644117f8598e28d9…

MALICIOUS

PDF

82.6 KB Created: 2021-03-25 08:49:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3cc397357b64404f82276d1ac5951963 SHA-1: 3bee66f1863b6925c915d65927532cb5091cc30d SHA-256: 644117f8598e28d96fcc2c6cb04106762cc4540aafe300edfa39726c5529bf97
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, with one specifically identified as a potential phishing lure related to camera setup. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic identifying it as a link farm on disposable hosting further support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=finepix+xp70+wifi+setup PDF link annotation
    • http://differencecheats.net/woxuxasiwopedibivaxabagiyxyv.pdfIn PDF document text
    • http://linza.media/412225567377a13v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464730/normal_60011feb106bd.pdfIn PDF document text
    • http://ontrade.top/akka_framework_tutorialmb4z6.pdfIn PDF document text
    • http://megatorg.ru/xirabilujutunazevzrrz.pdfIn PDF document text
    • http://blancer.xyz/mr_coffee_iced_tea_maker_manualebtok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390637/normal_5fd918a1c38ac.pdfIn PDF document text
    • http://handler-autoscout24.com/nejukaluxozekavuragodubonisydu.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/agnus_dei_music_sheet.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/google_local_guide_hotel_perksqyfvt.pdfIn PDF document text
    • http://jobs-ingenieur.best/joxuvuwukedakefatesiffivdv.pdfIn PDF document text
    • http://lisolu.org/quran_english_and_arabic_mp3f374k.pdfIn PDF document text
    • http://ligumexijigab.getenjoyment.net/wixogo.pdfIn PDF document text
    • http://tibetterrier.ru/introduction_to_psychology_notesrwbbh.pdfIn PDF document text
    • http://wizapivizesib.mygamesonline.org/names_of_god_bible.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489835/normal_5fdc11d11c58b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lonozote/speak_book_discussion_questions.pdfIn PDF document text
    • http://madigekole.onlinewebshop.net/14785611661.pdfIn PDF document text
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_b85ec99d8ab5463290e5163007855373.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ximupuv/29959846370.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_37cc030a98794362b231670debc645e4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 3724 bytes
SHA-256: 5f506f96885c68285abb08013964e969243e5a1cdb180af6bb27fe8127c8fd8a
font_01_sfnt_off0000ff3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3E 4892 bytes
SHA-256: 5cfe451471b3f0b53bec34eb3c971569409bda3c6ff767d282ae221f5cac1f72
font_02_sfnt_off0001102a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102A 13952 bytes
SHA-256: f8f72f943bbcaccbd912ff1b319d53be46b38ed1f6bec9f90cddcba02923c07d

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