Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3559e65875f9a53…

MALICIOUS

PDF

83.4 KB Created: 2020-12-08 17:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 123ed446914a9c2a58dbe6fc8c031b7d SHA-1: d1732b75ba729924d5aafc4a9f71f16465f7d66a SHA-256: e3559e65875f9a53522f06ffb8f538a6765f80a22a99f7633d3a0f6902c56d3d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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-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.
  • 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://trafffi.ru/strik?utm_term=asturias+guitar+tabs PDF link annotation
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/6128003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_5f92008422827.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/mutagodo-pigumozuzixosuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5fba47f3a1b88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_5fbbb18b1afbc.pdfIn PDF document text
    • https://vutizimowunofe.weebly.com/uploads/1/3/4/3/134354130/494484.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/4032315.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d6abc819f1cf4ceedbb/1606372714868/witchery_vampire_level_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2cf034-934c-408c-b4d9-4917de304358/sharepoint_2010_tutorial_for_beginners_step_by_step_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f349e2fce462bca5d5b8/t/5fc51f65fa04221c71c39269/1606754150016/moto_x3m_winter_cool_math_games.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5364b116eb00e3c68284b/t/5fcf24ab798354522d098c25/1607410860504/27246611730.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3b7d50a2757459bf48cbe/t/5fcab13f00d6046455a4def6/1607119168070/gun_shot_fire_war.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f5b088c99b6d37a76c18/t/5fcb29c5a0b42e3566a38baa/1607150022635/60652776850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a04eb0-a44c-4a18-b00f-9309d62f3425/steel_dragon_slayer_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18074be9b6939510f0b00/t/5fc5c0489d7936484054bed2/1606795339143/everstart_battery_charger_how_to_use.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CA 4948 bytes
SHA-256: deef47f1abfad1bfae84f657086fde0fbcce397f3f915d350544158311f3ccce
font_01_sfnt_off000101a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A8 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off00010d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0A 10712 bytes
SHA-256: a38f1df7fe1182ec729e7e2e106686f43503216b1203eaff9b92c0cc1ae98dae
font_03_sfnt_off00013204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13204 3680 bytes
SHA-256: c540ccaf9b28333d74e0e24aad9013055af2e8734d2f38f057f353e6ac87567d

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