Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fb5db46e52651f…

MALICIOUS

PDF

85.1 KB Created: 2021-03-31 23:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 720bae0e4600d3adab62f66b5ae62ecd SHA-1: b6342a226e7a51e11ccf580cfee687ddb68b6cbb SHA-256: 48fb5db46e52651f3b31054118bf3d430a177e904a9cccfeb811ecd07b89d5fb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-themed, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://kuzutuzo.ru/award?keyword=windows+2020+server+cluster+configuration+pdf PDF link annotation
    • https://cdn.sqhk.co/linidivez/fMgdhiq/hopper_stranger_things_actor_death.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/bininesamufoga_jimaxubelofox.pdfIn PDF document text
    • https://bosevexoliwi.weebly.com/uploads/1/3/4/5/134585498/zizidebelemineso.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/ia7Ndhe/sledziona_bol_plecow.pdfIn PDF document text
    • https://natatujefeni.weebly.com/uploads/1/3/1/6/131607075/kotobolugoxap-jolifajefumolup.pdfIn PDF document text
    • http://kawlites.online/88619479332u5vgu.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/can_you_notarize_for_a_family_member_in_georgia.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/79316198944.pdfIn PDF document text
    • https://cdn.sqhk.co/zozusexub/jjigFVN/google_hangouts_app_windows_10_download.pdfIn PDF document text
    • http://funseeds.site/happy_tree_friends_lumpy_legdy8ot.pdfIn PDF document text
    • http://white-x.fun/bernina_1090_manualv82y2.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
    • http://wegugoleta.onlinewebshop.net/enlace_ionico_concepto.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/how_to_connect_officejet_pro_8600_wireless.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/wizalonuwir.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/ebonsong_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/95856517116.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/small_tree_of_life_tattoo_designs.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/rironidupiloxuxibaparo.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/podusubuxumozow.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/how_many_calories_in_a_sonic_burger_patty_grilled.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/problem_solving_questions_and_answers_in_java.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/circus_1936_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/do_neurologists_diagnose_autism.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/puremo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10103 5644 bytes
SHA-256: 769083a0ce7d14c151c5deebe5785e10dd91277e4a81a1f98a09e8a901d75fe6
font_01_sfnt_off00011461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11461 10540 bytes
SHA-256: 1c94e2cac615d2a0ad13fb65d2d8bec9d1007d0ea7225abcf35b513670162ba8
font_02_sfnt_off00013859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13859 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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