Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc7d6bdb6a5a4ab…

MALICIOUS

PDF

80.2 KB Created: 2021-04-03 04:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 72f80678f9b1bbc412ae259f64b2acac SHA-1: d823d698490e72f5e5416ffa3aa54dd87bec5b31 SHA-256: 2dc7d6bdb6a5a4ab26d0a24591c3d25d37999fceca3d8877b4d0b2c083d4dd38
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though truncated and obfuscated, suggests a lure related to educational materials, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://gimoguvi.ru/wix?keyword=study+guide%252Fsolutions+manual+for+organic+chemistry+6th+edition PDF link annotation
    • http://1fps.ru/bekabv0lbi.pdfIn PDF document text
    • https://vezijukifi.weebly.com/uploads/1/3/3/9/133997169/2595448.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/afmc_2020_question_paper.pdfIn PDF document text
    • http://gudutisiluzew.mypressonline.com/articles_on_blockchain.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/what_to_read_after_all_souls_trilogy.pdfIn PDF document text
    • https://jozinuzo.weebly.com/uploads/1/3/2/7/132712000/suwepuzagelaxa.pdfIn PDF document text
    • http://zobevewobuka.22web.org/format_corrupted_sd_card_mac.pdfIn PDF document text
    • http://vofufime.mypressonline.com/satebatufuwuwena.pdfIn PDF document text
    • http://tryplafond.xyz/gixaverejibulujjka7b.pdfIn PDF document text
    • https://jalekusurasi.weebly.com/uploads/1/3/4/3/134392531/6659019.pdfIn PDF document text
    • http://felagem.getenjoyment.net/pexizuzotegapuwazafab.pdfIn PDF document text
    • http://onsideball.info/168307152541d64f.pdfIn PDF document text
    • https://jobexevufurol.weebly.com/uploads/1/3/4/5/134526996/ce51b6db89b5aeb.pdfIn PDF document text
    • http://nevoburaferivab.22web.org/como_es_una_foto_digitalizada.pdfIn PDF document text
    • http://blog-millionaire.buzz/onkyo_ht-r560_specsxanl3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_359363d458974011bb6d49aa99494a8b.pdf?index=trueIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_78befb192f5f4e018ad98cb48de36763.pdf?index=trueIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_d3eda386c9d04316ac4b05d86acb8bef.pdf?index=trueIn PDF document text
    • http://voradalupusar.rf.gd/agile_project_management_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/730c554e-bf21-40b0-a897-ecde26df1738/dell_755_tower_specifications.pdfIn PDF document text
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_88f6617cf05944178862a3dd6d273b94.pdf?index=trueIn PDF document text
    • https://bafc0710-e981-4561-a1e3-05e64562e179.filesusr.com/ugd/237bf7_c6cce7412ed54ebc81a2b90a86e9eb04.pdf?index=trueIn PDF document text
    • http://fozilixugijuva.epizy.com/adobe_photoshop_apk_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07188eae-1ed9-40e0-ba38-c86a5766320d/texukepefetujuzurorabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e223de46-2ea0-48a0-8f95-002f5acabf2a/2004_kawasaki_vulcan_nomad_1500_owners_manual.pdfIn PDF document text
    • http://puxabilaxomim.rf.gd/gezufurapoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/708a081c-df20-4df0-96e7-65dd9fd12b7b/buwaran.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE4 5828 bytes
SHA-256: 257a9c3f31a38b74b1e900440d6424ea2209e0586651438898372eb69283e064
font_01_sfnt_off0000f3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A4 12228 bytes
SHA-256: 8efc4ed5aba1ca017072718c8f19d5f4134f76ab1e7fe755d73cf58c5678fa7e
font_02_sfnt_off00011d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5A 16116 bytes
SHA-256: 144a9c0f276a09c664602d31bbc7b518ddd0a73264e50af6cece939a22ae1535

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