Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f2ad0a44b4be73…

MALICIOUS

PDF

82.3 KB Created: 2021-04-07 08:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4f825690eab1b6cac9e8d40a79bc83be SHA-1: 2189a192b8984900c1e49fcc056f957e78723a80 SHA-256: c5f2ad0a44b4be736f94625cbf24c145e1aaf14416697284fcc90601f1901d65
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or credential harvesting campaign. The presence of external URI heuristics further supports the attack pattern of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/wix?keyword=what+is+the+unit+of+speed+in+si+system PDF link annotation
    • http://cosmeteca.com/994601984209bxnd.pdfIn PDF document text
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/7518207.pdfIn PDF document text
    • http://blaugrana.ru/checklist_for_building_a_house_yourselfzmq3a.pdfIn PDF document text
    • https://jarajegixam.weebly.com/uploads/1/3/1/4/131437089/zijuxuxapi.pdfIn PDF document text
    • http://znakomstva69.space/jinowikomiwudifitep7gnb.pdfIn PDF document text
    • http://mimivudarevi.scienceontheweb.net/nasaviguxafenura.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/23265328100.pdfIn PDF document text
    • http://fsbsiod.com/xujeluramumosiz4ph88.pdfIn PDF document text
    • https://xagufiwukana.weebly.com/uploads/1/3/4/6/134694649/1161610.pdfIn PDF document text
    • http://tibetterrier.ru/yokogawa_plc_programming_manualdey1g.pdfIn PDF document text
    • http://yesnutural.space/exercice_perimetre_et_aire_cercle_6eka7lo.pdfIn PDF document text
    • https://lovizedisar.weebly.com/uploads/1/3/1/4/131437361/b30718343906.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f30e63-3555-4e6e-af46-4cbfb7981be0/how_to_override_luxpro_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ff5654-0b5d-44f4-a188-758e1f62714b/marshall_as50d_amp_review.pdfIn PDF document text
    • http://bugazepoja.onlinewebshop.net/biblia_de_estudio_holman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de0794b1-7e9d-4052-86d8-43a9feb920dc/mefux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e78e7d7-2ff9-4f60-845c-4f52a6223fa9/bolens_21_inch_push_mower_oil.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEE 5268 bytes
SHA-256: f135b49d6fbc9f57996dc74525ceaf39d33195f1d9b48ce88000389b3790458e
font_01_sfnt_off0000fed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED0 11656 bytes
SHA-256: 4bd4cb7946e903e0b98f0ebb8b04f3607d21e68bec6534749d3881fc60b7ffa5
font_02_sfnt_off000126c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C8 16060 bytes
SHA-256: b10e7a0583bf6b216a5471aeed10f14210f1dda3adb60ac5169fcb38ba12e60c

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