Malicious PDF — malware analysis report

Static analysis result for SHA-256 dedb0a7be59cbe5b…

MALICIOUS

PDF

72.8 KB Created: 2021-03-06 10:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b3b902f39ea2356a7604b3edd2edd3fc SHA-1: aa23b195d4c66609f1aeb4fe43df896380fbf27a SHA-256: dedb0a7be59cbe5b4b4a2d9513350bec3f702fc4157c5dabca5c4b3ea4acf05c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to 'xajibur.ru/award', suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by identifying the PDF as a link farm on disposable hosting, a common tactic for distributing malicious content.

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 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://xajibur.ru/award?keyword=for+the+love+of+act+science PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477658/normal_5fc5ec64f0718.pdfIn PDF document text
    • http://drive4mclaneaustell.com/because_i_m_stupid_piano_sheet_musicnxi4l.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/difq690/republic_of_china_simulator_2017.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470228/normal_5ff29f42aa980.pdfIn PDF document text
    • http://fitdieta.com/us_army_recruiting_command_battalionsy8vni.pdfIn PDF document text
    • http://jadebey-x.com/polaris_office_apk_android_4.2w87u6.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/7gfjjLf/ghost_hunter_tomb_raider_map.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/hhaVgfp/31770940570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474734/normal_6040348b47300.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/bheiiie/bus_simulator_ultimate_pc_indirilir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384160/normal_6012e0bf8dfaa.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxexaxi/5WUhgii/37322733576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_60033536272e8.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/3beed148-c360-400e-b381-3e012b613442/english_conversation_questions_and_answers_youtube.pdfIn PDF document text
    • http://dixasimoxipux.rf.gd/virekezij.pdfIn PDF document text
    • http://suwulinivez.rf.gd/bobakiropeganijeko.pdfIn PDF document text
    • http://jufakoxageponuz.rf.gd/md5_checksum_windows_10.pdfIn PDF document text
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_0c302afd7b154bdaa38e84ba3c8aa242.pdf?index=trueIn PDF document text
    • http://sitesiku.rf.gd/bhola_bhandari_nandi_ki_sawari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/624a25f5-e3a5-454f-abf7-4b7a0ba5a33f/82951038275.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_061d732cf1014869b675b031dfe8d9a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/74214c2f-f1f6-4d6a-b759-9ec35d922ecc/pubuwevut.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D7 4984 bytes
SHA-256: 4803bdc98c033ecea9c0be8ce99189ba9cb4743ac20dd7ec18e65914e16a50b6
font_01_sfnt_off0000f2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CD 10300 bytes
SHA-256: ee6611e1531950f20f348cf184ef73e38692979791b5fa2c69706cd7aac98963

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