Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0a9435b5793802…

MALICIOUS

PDF

69.1 KB Created: 2021-03-15 12:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 67793e2560ca8a6a38883213adeae760 SHA-1: 87602de89c90a3d050b37df34d25b5fb4a3242fa SHA-256: ef0a9435b57938025834fddb4dccf04a5fba9bccbcfa5d186ca129680400caa4
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 0.9997

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/wix?keyword=clicker+garage+door+opener+keypad+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402711/normal_601dadba775da.pdfIn PDF document text
    • https://ribufesoguvas.weebly.com/uploads/1/3/4/6/134680119/358340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_600e30c06513f.pdfIn PDF document text
    • http://ergors.space/setutozafunojodavutobobpmql7.pdfIn PDF document text
    • https://gukegibulu.weebly.com/uploads/1/3/4/6/134668459/nujakofovesupem.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/minecraft_oeuf_bookshelf_door.pdfIn PDF document text
    • https://nabebumiz.weebly.com/uploads/1/3/1/4/131452902/kimilawinetixo_wilowotexujaz_jobebuwik.pdfIn PDF document text
    • http://tiktokfrance.fun/hp_elitebook_2740p_touch_driverscs69r.pdfIn PDF document text
    • https://debosuvulodek.weebly.com/uploads/1/3/1/0/131071041/8b7e89.pdfIn PDF document text
    • http://pililiriniru.mypressonline.com/sadobisipubapuzowex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530846/normal_5ff25bf431a6b.pdfIn PDF document text
    • http://mnogoturov.com/bidurotezadatodapuduj8n1rf.pdfIn PDF document text
    • http://ponemofetu.scienceontheweb.net/chemistry_book_class_11_cbse.pdfIn PDF document text
    • http://doordash.fun/52702416401yr4dk.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/wekog.pdfIn PDF document text
    • http://dhl-order.info/best_ad_networks_for_android_apps88zp8.pdfIn PDF document text
    • https://jevokave.weebly.com/uploads/1/3/4/2/134266272/vesawejeviji-vukakalexibok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://teluroluxeterez.myartsonline.com/pudilulumogeza.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/puzujug.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/kofisuduvazofagiwesemo.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_off0000c6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E3 5208 bytes
SHA-256: 6060518cf874de7b191805d95978ddc26e083d26c33a3242e7606ca86501eaa7
font_01_sfnt_off0000d879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD879 9420 bytes
SHA-256: 6b5085fc28583d0523ba74aebde8bef451aeedf17469f9e503de94d21aeac83f
font_02_sfnt_off0000f8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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