Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c94969affb687c8…

MALICIOUS

PDF

80.2 KB Created: 2021-03-29 21:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: abb067a5de5b2fd2913942a1f8380fea SHA-1: c0679083ce6a8954766bcdede27180090d152ec1 SHA-256: 9c94969affb687c89777fb41cd4d63567fa910d1b427a5ed8db753b1f790a331
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 0.9957

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://druttle.ru/123?utm_term=game+clumsy+ninja+mod PDF link annotation
    • http://zumewidife.mygamesonline.org/vimunabilax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417814/normal_5fe63dad23ab5.pdfIn PDF document text
    • http://wavapivanuf.scienceontheweb.net/yaesu_ft-7800_software_download.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/project_report_on_road_accident.pdfIn PDF document text
    • http://wozuxel.getenjoyment.net/advantages_and_disadvantages_of_tourism.pdfIn PDF document text
    • http://nipobudagese.mypressonline.com/aprendiz_de_brujo_david_bronstein.pdfIn PDF document text
    • http://pivowave.iblogger.org/que_es_languidecer_en_ingles.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422145/normal_5ffca090d3428.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/broken_spears_poem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418584/normal_60404ac6c8289.pdfIn PDF document text
    • http://rofodas.22web.org/organic_chemistry_formula_sheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fccd386d-42e2-454e-8fab-3b613b0c2c41/apollo_twin_x_usb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c39ab80-ac7c-4b2c-bb3a-85a9f21738d5/how_to_install_acurite_weather_station.pdfIn PDF document text
    • http://gutolagewu.rf.gd/77366027704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2846c35a-12c8-4803-adb2-1dcade59616c/is_there_a_vhs_adapter_for_mini_dv_tapes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36dfecba-c707-4f4e-9e7f-3a6cd364794e/39394660801.pdfIn PDF document text
    • http://lufafutogixafu.rf.gd/collision_reporting_centre_toronto_downtown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a88dbc0f-5659-401c-a2b8-5cfc397487a6/36296102975.pdfIn PDF document text
    • http://xaduwefel.rf.gd/51587182181.pdfIn PDF document text
    • http://nekelaxowe.atwebpages.com/9688667053.pdfIn PDF document text
    • http://wufikemofumop.atwebpages.com/48730775261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d039259d-65b1-41e5-a332-5bc867dca523/xebefojax.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/topatisut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dee7b584-5426-4b87-9164-40e287a42ac6/2018_subaru_forester_xt_touring_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee7ce60-6f2d-46df-a26d-714574d53a47/teddy_bears_picnic_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d7afbf4-daf3-47f7-b175-e91beb0416fc/witotinekikazinujeme.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/motuxagoxujefirunagovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/212dc3ca-6140-4146-8b6d-bb46707cc2e5/xadatasan.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB7 5200 bytes
SHA-256: 756aded0c54f7fb27f7aa8b539c4eb6ebc701cdda9c246eb7a49b1bc4dd43677
font_01_sfnt_off00010e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E66 10568 bytes
SHA-256: 5caf7ddfe5d0fa901e73bb088ea1b0dabe1df67c2196cd3b0681b31be9f22e6b