Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c929ac2db0b5c8…

MALICIOUS

PDF

84.0 KB Created: 2021-03-15 13:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0b623fe1f63138b6c8785e97a45d7ad4 SHA-1: 22dc5b87635b189d30c96b3ea1e36d3b11566f35 SHA-256: 33c929ac2db0b5c8f8d1d63b5dd129b1ebb091ca749e71779208d3c8daf27df1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to a documentary, suggesting a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xajibur.ru/wix?keyword=child+of+rage+documentary+beth+thomas PDF link annotation
    • https://lujonojezim.weebly.com/uploads/1/3/4/5/134588784/00493a37.pdfIn PDF document text
    • http://zifufarox.getenjoyment.net/56882155789.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/23493903448.pdfIn PDF document text
    • http://fumumowovufa.mywebcommunity.org/34001512690.pdfIn PDF document text
    • http://fujubipe.22web.org/balbir_video_2016.pdfIn PDF document text
    • http://wurulef.22web.org/xodegominoturosu.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/arap_bahar_nedenleri_ve_sonular.pdfIn PDF document text
    • http://farotosinotom.mywebcommunity.org/brunner_and_suddarth_s_textbook_of_medical_surgical_nursing_14th_edition.pdfIn PDF document text
    • https://monoxoni.weebly.com/uploads/1/3/0/7/130738852/6798049.pdfIn PDF document text
    • https://zirakamu.weebly.com/uploads/1/3/1/3/131398357/64e6393f9.pdfIn PDF document text
    • http://nuzenupezebep.iblogger.org/guia_completa_de_calistenia_gratis.pdfIn PDF document text
    • http://niburufajanuto.sportsontheweb.net/xijerolazifeb.pdfIn PDF document text
    • http://wewedaz.iblogger.org/7579987281.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/3940380817.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mumufikoxid.epizy.com/holiday_2020_makeup_releases.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/47812631653.pdfIn PDF document text
    • http://xatonerux.epizy.com/buku_arbitrase.pdfIn PDF document text
    • http://gixejemazob.myartsonline.com/nonirejowatana.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/niwufumesa.pdfIn PDF document text
    • http://fozugafunu.epizy.com/22039137758.pdfIn PDF document text
    • http://puwojewemuxa.epizy.com/canon_ts3122_setup.pdfIn PDF document text
    • http://legopabez.rf.gd/angle_relationships_review_worksheet_answer_key.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDD 4020 bytes
SHA-256: d7c7a42b5b5423e446786ff4c1c3b055ee2ebbc188b9ac0e070b6327d0c04ad9
font_01_sfnt_off00010a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A01 5580 bytes
SHA-256: 9047794f554360e86014d8219f4a77f275fd16f554500b6c4be7fd43da521f03
font_02_sfnt_off00011cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD6 11008 bytes
SHA-256: a9dcb416e1ee1948097714bf5392d5fd78026716694e7f3677d23248b4fa3990

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