Malicious PDF — malware analysis report

Static analysis result for SHA-256 627d2306e4840283…

MALICIOUS

PDF

77.7 KB Created: 2021-03-18 08:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0de7f354078d679162787ecd438b0d9f SHA-1: 8787ec6b574c548a488a8b8511927c50192c1c56 SHA-256: 627d2306e48402838124f6b59a010e9eac86f0ad155a06169f868f48ea5ae7ca
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm hosted on disposable domains. One prominent URL, 'https://fokemale.ru/wix?keyword=traits+of+a+good+student', suggests a lure related to student traits, potentially for phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

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://fokemale.ru/wix?keyword=traits+of+a+good+student PDF link annotation
    • http://mifirejetevina.getenjoyment.net/54284323146.pdfIn PDF document text
    • http://zuxekagapefe.mygamesonline.org/2020_tax_calendar_philippines.pdfIn PDF document text
    • http://idealsit.fun/persona_4_psp_rom_download14iso.pdfIn PDF document text
    • https://cdn.sqhk.co/jifegusewe/gjd5NoW/guess_the_drawing_game_answers.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/sap_basis_r_3_administration.pdfIn PDF document text
    • http://fulukegoror.getenjoyment.net/lesusinigovazak.pdfIn PDF document text
    • https://cdn.sqhk.co/fasuzozo/ax497KM/rokalekemapobagozafafana.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/ajhBibr/8533913530.pdfIn PDF document text
    • http://fb-copyright-help-from.com/social_projection_bias_examplep5cnl.pdfIn PDF document text
    • https://cdn.sqhk.co/zolususux/mIbz4Ki/costco_shepherd_s_pie_nutritional_information.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/97e830fd-fadc-4f5c-ae30-2b6bbb4af9f0/63893107203.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/879452669.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/relative_clauses_examples_with_answers.pdfIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_8bdfd45ae3d24c92a7cb609d648becd0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/game_casanova_hotel_mod_apk.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_460bd4bff44d4416a101d0269ecffbbe.pdf?index=trueIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_3ef986c7a4444177a9b2ef0ba8feecbc.pdf?index=trueIn PDF document text
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_86b86efb0500447aac8d2d46cabb3bb2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2feec2a-fb56-49ed-9907-84a340141da8/1085738284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78e51b3f-efbd-4b94-afa1-5d49191a9a04/what_are_the_different_types_of_signals_according_to_location.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/tibuzar.pdfIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_c6f7889acea2484789a6235ea2dc5b91.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_off0000f209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF209 4992 bytes
SHA-256: 79bd9010a8f4df6a01891c5da15fd63812e0b9ffcf7993d751b7efaf46e55d87
font_01_sfnt_off0001030f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030F 11004 bytes
SHA-256: fa58917be6c71cbd36f498fbddb36354c46e62855a7ae1495f02982d676dae00

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