Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d241bc90afe2ff…

MALICIOUS

PDF

78.1 KB Created: 2021-03-20 20:06:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1df43df35022f7fca354cbc61cb34d91 SHA-1: 8e835799c383587061b4bae1f9729d72008cd052 SHA-256: f3d241bc90afe2ff6067b1114eb5b15293fc7fa6819e8d0590ec684bf6a5f66f
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute traffic to various potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/wix?keyword=glass+sword+pdf+google+drive+english PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4478383/normal_5ff49e0c9c1a6.pdfIn PDF document text
    • https://cdn.sqhk.co/fokofike/Qojauge/film_big_fish_2003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420438/normal_605501c71764b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380883/normal_5ffcc21ecb08a.pdfIn PDF document text
    • http://sezituza.66ghz.com/14702663515.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/2895725.pdfIn PDF document text
    • https://cdn.sqhk.co/biwizalibe/uihge4E/87483336135.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/k1jhheU/cowboy_hat_styles_by_region.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/Jhbo4cR/grand_furniture_phone_number_in_newport_news.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/iipugfB/66014481573.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/jhigCM6/26612257803.pdfIn PDF document text
    • https://lopowizuxo.weebly.com/uploads/1/3/4/4/134438001/8015993.pdfIn PDF document text
    • https://vevusivo.weebly.com/uploads/1/3/0/8/130874001/vavegumemawewufafim.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/rryZihW/rocketman_songs_all_elton_john.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/7Whgo8u/connected_drive_spotify_android.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://xijuroluzuka.epizy.com/46754293688.pdfIn PDF document text
    • http://dejarovagozude.epizy.com/fejeguroteloragura.pdfIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_3c7d60679c2c49b8bffd8e635b3aec37.pdf?index=trueIn PDF document text
    • http://lofetumavigasi.epizy.com/logical_questions_and_answers_in_telugu.pdfIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_7eb81c1c72684767b08b698130d48304.pdf?index=trueIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_049022302cd64acd8296891734502451.pdf?index=trueIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_1756a57208324f9caa18bf5521a8d139.pdf?index=trueIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_2bc25fb734cd42e2bb0aa56ac9f46594.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_off0000e6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A8 5196 bytes
SHA-256: b884551f2c7dab115cae9a57a30d95a40ebc3c9a8691a93a74db06e7e0dabf56
font_01_sfnt_off0000f862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF862 10620 bytes
SHA-256: 591fa16e4f6f18b572d95cb4730fd4efec4677048ebe3f193bb207fb26f83c65
font_02_sfnt_off00011caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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