Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b55743f7d78b6c9…

MALICIOUS

PDF

70.8 KB Created: 2021-02-11 20:33:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 36b514437bce2207114afb6c1f69ccff SHA-1: 1bed7d128e9d230a0ecc2f7bc65eb2f1547d5a98 SHA-256: 4b55743f7d78b6c9a5b12098dba7980943ee57bb3764bdf668292b88dbf2705c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/wix?keyword=c+primer+plus+pdf+github PDF link annotation
    • https://vuzizakepavojen.weebly.com/uploads/1/3/1/4/131484090/vaxojik_bosovud_dinariruradokog_zariwude.pdfIn PDF document text
    • https://tixanesel.weebly.com/uploads/1/3/4/2/134234664/e8e8c210e4ea7.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/nyjfhhg/folder_sync_alternativen.pdfIn PDF document text
    • https://vubilidupetox.weebly.com/uploads/1/3/0/9/130970012/labirutub_nubobe_kuzigile_zupadodegavo.pdfIn PDF document text
    • https://cdn.sqhk.co/wekababu/b2ibiih/my_cloud_setup_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/lidojuxuxiro/jgegfic/1694604551.pdfIn PDF document text
    • https://cdn.sqhk.co/radageroboko/hALCMVL/lil_hoops_basketball_arcade.pdfIn PDF document text
    • https://torudedo.weebly.com/uploads/1/3/4/3/134352944/2595532.pdfIn PDF document text
    • https://sibotapitagota.weebly.com/uploads/1/3/4/3/134378411/4480611.pdfIn PDF document text
    • http://digitaloffice24.ru/centrifugal_fan_curvedo3yl.pdfIn PDF document text
    • https://biligimanud.weebly.com/uploads/1/3/1/4/131454089/pewus.pdfIn PDF document text
    • https://pukunave.weebly.com/uploads/1/3/5/9/135957849/e72517882d26.pdfIn PDF document text
    • https://jijejadu.weebly.com/uploads/1/3/2/6/132683218/9654381.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://s3.amazonaws.com/widofafane/game_soulcraft_cheat_mod_apk.pdfIn PDF document text
    • http://majexubul.rf.gd/placing_decimals_on_number_line_worksheet.pdfIn PDF document text
    • http://xenuduximowub.epizy.com/labose.pdfIn PDF document text
    • http://xotepugiz.rf.gd/economics_gce_2019_question_and_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/avatar_film_video.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/nice_guidelines_head_injury.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC211 3368 bytes
SHA-256: 2e9feacd4691d8fce174a8d3c675c0b76cc6bd5fb9b17975c8ffca19daddff1a
font_01_sfnt_off0000ce2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2D 5072 bytes
SHA-256: 04d8b2c8d4ded40470177061c7a197cfa7a2fc0adb859eb5e5e6bbd50c52d589
font_02_sfnt_off0000df67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF67 9464 bytes
SHA-256: 889aa0f9ea07c5a44793332743fe1467dc991b7a3e873d6d67eca9f200bbdc8f
font_03_sfnt_off0000ffba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBA 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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