Malicious PDF — malware analysis report

Static analysis result for SHA-256 be477eb4c977d95e…

MALICIOUS

PDF

78.6 KB Created: 2021-03-20 18:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a29dc6ae3fcbcfed8b560deb82f090db SHA-1: 20c647a0ebb36b4e4cbf042981a561fb7ca1b68a SHA-256: be477eb4c977d95e524756cfede3bf3ddde3de9756a43efcab1124e243a22fea
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URI pointing to 'dugedepap.ru', which is likely a phishing or malware distribution domain. The document body, though partially corrupted, suggests a lure related to academic citation styles, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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=bibliografia+segun+apa+pdf PDF link annotation
    • http://daxamel.mywebcommunity.org/goodbye_air_supply_piano_sheet.pdfIn PDF document text
    • http://tegubija.mypressonline.com/75652218277.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/25193083030.pdfIn PDF document text
    • http://lagejarejitog.mypressonline.com/sbi_personal_accident_insurance_policy_proposal_form.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/17324618309.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/anti_human_trafficking_organizations_austin_tx.pdfIn PDF document text
    • http://dabopoxele.getenjoyment.net/75405507005.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/46422056540.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_47f1c78ee74c4c21ae409f72aed9df00.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f3ab3b-be7c-4392-acad-3de82052ba2b/board_game_rulebook_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d008d809-035d-4405-9d5a-d73034b1cff4/635939125.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_dc8bf27ca109492c9792956723367db5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3318216d-9648-482f-8bb1-97cff7fb7cda/9962359049.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/xefen.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/how_to_clean_a_keurig_water_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/mefifexaxuno.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/java_an_introduction_to_problem_solving_and_programming_7th_edition_by_walter_savitch.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/86473408594.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_c97571864fe94216add1381ac309e4b0.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_ea039c51bd0041bdaa60d1db53e6df52.pdf?index=trueIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_396fbeb60b1f485fa9779ef9eaebed19.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/bharathiar_kavidhaigal_with_meaning.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_4c987a05b1ba47ddba82886d110561dd.pdf?index=trueIn PDF document text
    • http://gurabagoderes.atwebpages.com/jiliwofebopokor.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_7037a6b06ba847bba6ed9c9f2cda7969.pdf?index=trueIn PDF document text
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_5e2ff0257f934245991a8e159343eb10.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23B 5396 bytes
SHA-256: 3dd95bc803c8ec71f6c79cb12cb44b41e807ee0548dc37086c37b249b910312c
font_01_sfnt_off000104a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A5 12040 bytes
SHA-256: 201bf8b3dd905e906539e37db41beb2abb3e159ec53e4c67c5a2cc368ece7d1a

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