Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89d6250e48495c2…

MALICIOUS

PDF

75.4 KB Created: 2021-04-03 23:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9d2e86bcb2cb5acbd32ea2668ebc06e1 SHA-1: d1b1b2bb61847f308b6b455b93f6bb1b929ba2cb SHA-256: a89d6250e48495c26713aeb67e357eb656f25121889306fe23ccf90b94f0e0b2
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://xezojetit.ru/123?utm_term=greaseproof+paper+sheets+cape+town PDF link annotation
    • http://logusubunovad.22web.org/gudow.pdfIn PDF document text
    • http://pepipejevu.iblogger.org/surah_ar_rahman_rumi.pdfIn PDF document text
    • http://zinisugezuxatig.iblogger.org/waxasubozuxasatu.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/cf7cf73e0f2a40.pdfIn PDF document text
    • http://letaraluzim.scienceontheweb.net/gonubuxeribagewanu.pdfIn PDF document text
    • https://xabetibupu.weebly.com/uploads/1/3/0/7/130738966/c4def51f.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/xasupu.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/comment_nouer_une_cravate_slim.pdfIn PDF document text
    • http://vorusobowa.66ghz.com/ableton_live_9_ita_mac.pdfIn PDF document text
    • https://wibipujesotut.weebly.com/uploads/1/3/1/3/131398272/fonimesodofu-rosaput-tomukes-rajogifematalew.pdfIn PDF document text
    • http://wawimetuboze.iblogger.org/vodewonowogesopili.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://uploads.strikinglycdn.com/files/188fdb0e-0750-49e6-ab56-5b89808ab71d/wd_my_cloud_download_manager.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886cc8ae-6f6f-4b1b-82b3-552c9978f62c/mathematical_statistics_lecture_notes.pdfIn PDF document text
    • http://zibuxaladovokex.epizy.com/rofud.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/area_of_combined_shapes_worksheet.pdfIn PDF document text
    • http://mudoxaw.epizy.com/emulator_gba_pc_free.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/rovon.pdfIn PDF document text
    • http://zasuzutan.rf.gd/pas_79_fire_risk_assessment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bed0f5f-bd47-440c-a5cd-d9ac3e07e02f/ernest_hemingway_son_death.pdfIn PDF document text
    • http://sabozet.epizy.com/live_stream_tv_apk.pdfIn PDF document text
    • http://kexomun.myartsonline.com/analoga_significado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef464c7d-a902-4e2e-8cc7-ad4ef842ec6f/zotuj.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/how_to_tell_if_a_dachshund_puppy_will_have_long_hair.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/best_camera_lucida_for_artists.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/kigadinazuzi.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_off0000dc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC73 4932 bytes
SHA-256: d23a8a35db60c624dd1519134b3d73497c8947d4e6b4e4b397e1d37f4f0363a6
font_01_sfnt_off0000ed3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3A 10756 bytes
SHA-256: b1157213696157fc4f659c5a41ffc802fea467a6cfb594e3807f3556510453fd
font_02_sfnt_off000111d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f