Malicious PDF — malware analysis report

Static analysis result for SHA-256 49407339b9784439…

MALICIOUS

PDF

85.6 KB Created: 2021-04-01 10:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a801a38095a0f63ab8d25579c094f3f4 SHA-1: eaf7683e6e6a3ce680bd80575941e9a45822f494 SHA-256: 49407339b978443944b45de20b9536e08dd23542aa26e736e93053e76284d9da
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://lozipotod.ru/strik?utm_term=thermador+refrigerator+column PDF link annotation
    • http://sexugaweguko.iblogger.org/the_witcher_3_complete_edition_strategy_guide.pdfIn PDF document text
    • http://helpcenter.business/over_the_rainbow_piano_chords_and_lyrics4epu1.pdfIn PDF document text
    • https://nulijuvak.weebly.com/uploads/1/3/3/9/133986618/1331807.pdfIn PDF document text
    • http://werenntaq.online/1992_yamaha_40_hp_outboard_manualhdsmm.pdfIn PDF document text
    • https://jefaganogebe.weebly.com/uploads/1/3/1/4/131437435/tudususizom_jusibuba.pdfIn PDF document text
    • https://lalupapetawosi.weebly.com/uploads/1/3/2/8/132816164/makufikum.pdfIn PDF document text
    • http://pezisafepogux.22web.org/80954486064.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/007c4e0177506.pdfIn PDF document text
    • http://livethailand.fun/47499574131ni8wd.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/luranupimofojarinejaxoxi.pdfIn PDF document text
    • http://dalifajebuxog.scienceontheweb.net/buku_belajar_bahasa_jepang_dasar.pdfIn PDF document text
    • http://russianstravel.ru/dolls_house_characters_katherine_mansfieldgaiy5.pdfIn PDF document text
    • https://sajosapisede.weebly.com/uploads/1/3/4/3/134344890/0e7d063910542a.pdfIn PDF document text
    • http://saripituxupagek.sportsontheweb.net/89146084279.pdfIn PDF document text
    • http://peramabejakes.sportsontheweb.net/best_self_introduction_for_freshers.pdfIn PDF document text
    • http://merishwheelrecords.com/tajunodumijivuh8ad6.pdfIn PDF document text
    • https://garepogive.weebly.com/uploads/1/3/4/8/134871831/bf1d62f7a0.pdfIn PDF document text
    • http://xigesoti.iblogger.org/22288617548.pdfIn PDF document text
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/468503.pdfIn PDF document text
    • https://gigewobejej.weebly.com/uploads/1/3/4/6/134638222/vuluduwajubedux.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/5177422.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://sujotoginejo.rf.gd/uos_admission_form_ba_bsc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c55dcee-a7e7-4cf8-b1d0-a7768bc2455b/engenius_durafon_1x_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21365801-a6db-4b2f-bbc0-bac60dfa1886/diccionario_ingles_espaol_online_google.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c38eef-7892-469f-b547-22e3bbe9a8ae/the_most_human_human_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24799534-6bdd-4529-ba50-f76dcd840d9c/gazelle_edge_machine_results.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d411c07-97ec-4b44-b3cd-d9d35351bba7/62076750113.pdfIn PDF document text
    • http://vuxebezedigelun.onlinewebshop.net/kerexanovur.pdfIn PDF document text
    • http://sixosotonipo.epizy.com/gujukekevofera.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_off0001034d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 5088 bytes
SHA-256: ea95a23b5445738ef9397bf848ddadcd79c4819008d2a47eff2b331fde6a697a
font_01_sfnt_off00011470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11470 11104 bytes
SHA-256: d8771a9475d4966a79de230b623bd07d076957e5c0ea99868cfa6b5dd87d4ce9
font_02_sfnt_off000139f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176