Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c5a614d60565eb…

MALICIOUS

PDF

134.3 KB Created: 2021-04-01 06:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 43410d76df6c52fad75ac37f17ea85ff SHA-1: c1d8072c2cda2a607e90101101bea3b45faecb13 SHA-256: 39c5a614d60565ebe8301c12e829eb6af72c9036f0faa76e5d5abca90687ff53
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://baarspo.ru/strik?utm_term=tug+of+war+game+rules+in+urdu PDF link annotation
    • http://viwafuxofiseko.getenjoyment.net/xodovodurimepasoted.pdfIn PDF document text
    • http://checkmycredit.info/mijuripenajxqaff.pdfIn PDF document text
    • http://hydrofthol.space/rafatqidx9.pdfIn PDF document text
    • http://arboozfilm.com/callan_method_stage_45idxd.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/alfreds_basic_piano_library_theory_book_level_1a_answers.pdfIn PDF document text
    • http://vafijevimam.iblogger.org/energizer_lithium_aa_battery_datasheet.pdfIn PDF document text
    • http://xbet1.fun/dragon_age_origins_dlc_codes_xbox_oneay6fv.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/awqhghj/navneet_kaur_osu.pdfIn PDF document text
    • http://mibebar.22web.org/comment_rediger_une_lettre_de_motivation_en_anglais.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/cFBnhiK/simple_keyboard_apk.pdfIn PDF document text
    • http://chebsvet.ru/que_es_el_estado_de_derecho_mexicanov5dp2.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/jgRiibY/roku_ultra_cyber_monday_2019.pdfIn PDF document text
    • http://zofiziz.getenjoyment.net/bupaz.pdfIn PDF document text
    • https://cdn.sqhk.co/kavonalitego/ghhdHjd/soccer_drop_ball_etiquette.pdfIn PDF document text
    • http://gawudubigojan.getenjoyment.net/80741927737.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://faregelifega.rf.gd/18407932011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5434c73c-b9af-4a43-ae2a-f2d99f681e0f/tp-link_portable_3g_4g.pdfIn PDF document text
    • http://vunibem.epizy.com/aplikasi_video_instagram_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e94d84d2-7977-4e3d-9b63-99fa6b6b474f/lessons_from_madame_chic_blog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e425df64-aba5-44cd-8278-5209cd248949/38073722153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b3fae52-bce6-44ba-8d4f-9da8023029a1/pakelibenej.pdfIn PDF document text
    • http://rowezezivifa.epizy.com/vilefijesezazuwizorejeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff6553a-3b0a-4795-97c4-f164678c19ec/how_much_are_online_photography_courses.pdfIn PDF document text
    • http://minudumira.rf.gd/xorizosajided.pdfIn PDF document text
    • http://giworutiw.myartsonline.com/somewhere_over_the_rainbow_chords_in_c_major.pdfIn PDF document text
    • http://gorifolowisawi.rf.gd/16895923904.pdfIn PDF document text
    • http://fisuwadufojotu.rf.gd/montreal_metro_map_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ab1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB1E 5268 bytes
SHA-256: 59d51f3cb54641186fc332aeb4ca2dbe9d2dd9139209e0705cf09163960a7408
font_01_sfnt_off0001bd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD08 2604 bytes
SHA-256: 7f3a1ef136f36ba68bc36e5bcd31de243dce7f4b60e01c4bc40f508baeb48ca0
font_02_sfnt_off0001c824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C824 13284 bytes
SHA-256: 955d701a3f24cc3594f6578675a075d95437ae1939e6423b0c1fdad4891705a5
font_03_sfnt_off0001f1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1E7 16648 bytes
SHA-256: 4873b58f76d0ea9c55f1d46efc0079a55d77519406ea4ed86af5e111a6298363