Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb0eb2ce4c3b564…

MALICIOUS

PDF

73.0 KB Created: 2021-03-06 00:55:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 21d9444478309ab3a88eb4a2ba87ae9d SHA-1: 568907c2c59cc3be739c2670eccc9a0fe9469a8e SHA-256: 0bb0eb2ce4c3b5641f99f97bbfda206a1f28d3ecc5e409a092397ec4d44dbe30
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://kuzutuzo.ru/strik?utm_term=how+to+descale+the+delonghi+magnifica PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370285/normal_6015ab30bafe7.pdfIn PDF document text
    • http://ririxodija.22web.org/satik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_60178d2604c0f.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/learn_japanese_book_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/9bhddN2/68172548163.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5fdd79f6451a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450514/normal_5fe3c4727db6d.pdfIn PDF document text
    • http://matcobzor.ru/sample_appraisee_comments_for_performance_appraisals7tvuu.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/hKTxhcw/71569618821.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366335/normal_5fcaa581874ab.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/TSje5ih/logo_quiz_level_306.pdfIn PDF document text
    • http://idealica-uficiale.website/ziridijiancqc.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwokosokif/dghZY2O/christmas_sunday_school_lessons.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/ichaygg/dj_music_mixer_player_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaralitotido.rf.gd/nezoxotavuvagarusoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b4e9ce2-576e-469d-816d-873ab497c72d/trigonometra_y_geometra_analtica_michael_sullivan_ejercicios_resueltos.pdfIn PDF document text
    • http://zetipetarot.rf.gd/vugagogo.pdfIn PDF document text
    • http://jawomutiz.epizy.com/wikefuxomuworodogifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93036b0d-29d0-47fe-bfa1-503b050c7de7/75464376711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/251ad3c9-7101-48f6-953a-601cf65bdbad/cyberpower_1500_avr_overload.pdfIn PDF document text
    • http://suborox.epizy.com/excelsior_college_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/344c202d-6f61-4a5c-90d8-3ffbdf705e0d/69597738444.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_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 5392 bytes
SHA-256: 46828e0114eb268ed720487e7dfe3f99527a7e66cc93887e7f969636772b714b
font_01_sfnt_off0000f2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F4 10512 bytes
SHA-256: 9f8bf07579423fa401ab4fdfdd43f49591cc6d8b6919774b28397c30efcc943c

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