Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8beda00c5b5a24b…

MALICIOUS

PDF

69.8 KB Created: 2021-03-17 19:03:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e9ddc2545781310029a619cae9186d0f SHA-1: d96139e6a9adc94d5bd15a8d8c4eff2760594aa2 SHA-256: b8beda00c5b5a24bec8b4f55834ee1695f3a55ff4f1c96f6fbb9dd306bdea2ea
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with one prominent URL, 'https://dugedepap.ru/award?keyword=benim+hocam+tyt+fizik+ders+notlar%25C4%25B1+pdf', suggesting a phishing or scam lure disguised as educational content. The presence of many disposable links on disposable hosting further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=benim+hocam+tyt+fizik+ders+notlar%25C4%25B1+pdf PDF link annotation
    • http://lamaded.mywebcommunity.org/16370958073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_601d3d4e3c931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_603b07de72160.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/b_pharmacy_syllabus_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_5fd996947364a.pdfIn PDF document text
    • http://kuviruvada.getenjoyment.net/clinical_trials_protocol.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/nugudojadipogifufavotovin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488581/normal_6042216082e58.pdfIn PDF document text
    • http://resokipuga.getenjoyment.net/pidijum.pdfIn PDF document text
    • http://rezanufeku.mygamesonline.org/bridge_to_ielts_vk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_604392ffcc605.pdfIn PDF document text
    • http://tadidavazutopa.sportsontheweb.net/gagufabilodiwajox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temipaz.epizy.com/68342184573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f6007c5-25ea-4a74-857e-a9aa55f3539a/gizeluza.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/top_10_bollywood_music_websites.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/how_to_delete_messages_on_a_panasonic_phone.pdfIn PDF document text
    • http://wewamamewiler.atwebpages.com/zuvezuzofodizozoterut.pdfIn PDF document text
    • http://lufivut.rf.gd/catalasa_en_la_papa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f1c4c8-ce03-4394-b7d9-1bc37f830e05/nupimug.pdfIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/kobagozexamit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9bb40cd-9922-4050-bbb5-ddf4c39f61cc/ronilasanexuvekeke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a71180-e4ae-43af-9ae6-70f4222376c8/dikarumuvazukelutisekuvob.pdfIn PDF document text
    • http://kadizilurojiniz.onlinewebshop.net/stairway_to_heaven_backwards_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/bubble_star_game_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/31230992735.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_off0000ce00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE00 5692 bytes
SHA-256: c270260996528439c79ef26b00566d6ac5a69377da83dd9e01b72edc096a21a1
font_01_sfnt_off0000e14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14C 12184 bytes
SHA-256: 4f5c3352f8f9fcff6ae67b536aec07350ab64bf74b402cf18c6bd581da6deacc

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