Malicious PDF — malware analysis report

Static analysis result for SHA-256 1361278234b4276c…

MALICIOUS

PDF

71.9 KB Created: 2021-03-14 00:12:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b800deb77eacd1e8e65011c4c839183b SHA-1: 476c49d0367d2fb2f3f9f46109917f6d4c8a28f3 SHA-256: 1361278234b4276c502ad4dc8125fe689a426fa3606a7401fc6b502e4e891a78
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded links, many pointing to disposable domains, designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, includes keywords related to scales and arpeggios, likely serving as a deceptive lure to mask the malicious intent of linking to 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://nipisod.ru/award?keyword=piano+major+scales+and+arpeggios+pdf PDF link annotation
    • http://xogunajeraxuda.mywebcommunity.org/how_to_reset_a_sony_amplifier.pdfIn PDF document text
    • https://fenizivafuno.weebly.com/uploads/1/3/1/3/131380836/buvonofozab-kiduzedesesaj.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/16139915395.pdfIn PDF document text
    • http://jsexj.fun/when_is_the_black_friday_ad_for_walmart_coming_outtqtnz.pdfIn PDF document text
    • http://wwnews.site/fibber_mcgee_and_molly_episode_guidey1fao.pdfIn PDF document text
    • http://vrestoran.info/tegemepujobakuvilet8ht2l.pdfIn PDF document text
    • http://arevakar-travel.com/national_occupational_standards_for_teaching_assistants_in_walesjnk39.pdfIn PDF document text
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/702103.pdfIn PDF document text
    • http://bumaga.bz/joint_fleet_maintenance_manual_volume_4uon8s.pdfIn PDF document text
    • https://novudadunofeted.weebly.com/uploads/1/3/1/6/131637175/1051830.pdfIn PDF document text
    • http://sokepazetovul.22web.org/armstrong_air_furnace_flame_sensor.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
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_e9c2dfe031d242d291a17389b260d98e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiniruru/11958934372.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/dirizadadulaxa.pdfIn PDF document text
    • http://mopakutabeka.rf.gd/47730121165.pdfIn PDF document text
    • http://vanudedu.epizy.com/73045313783.pdfIn PDF document text
    • https://4c982f7a-b72b-446d-8c7a-5e2d6818c0db.filesusr.com/ugd/519a61_1638978a3b334fd8b570d8dd0e8bdcba.pdf?index=trueIn PDF document text
    • http://watusatuvor.myartsonline.com/duxojiradasor.pdfIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_f6d37845b86e4baaa9f94bab8ad2b970.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_off0000ce91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE91 5260 bytes
SHA-256: 582859192d5d05c24ccde09bec1f4297d9a1911a3c1594ab4bc1b24600d8adbb
font_01_sfnt_off0000e04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04E 9916 bytes
SHA-256: f7c1ee1309aa27c40785cf615e382fbd8fa7519766f4142c5600fbf7f09f2d3f
font_02_sfnt_off000101e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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