Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c163a096341417e…

MALICIOUS

PDF

69.6 KB Created: 2021-03-10 08:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 526668d86e19662395a8dd2b257d6d49 SHA-1: cb62dd5931e6696cb58573908871bbb90a7aa6a7 SHA-256: 7c163a096341417eebf72886880c021bac09ffeb1204a0a57d381287538f90c8
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.8129

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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://dugedepap.ru/aws?utm_term=how+do+i+sign+up+for+obamacare+2021 PDF link annotation
    • https://gajatizu.weebly.com/uploads/1/3/5/3/135315297/9303571.pdfIn PDF document text
    • https://demuxovepeb.weebly.com/uploads/1/3/4/3/134311881/sifekufup.pdfIn PDF document text
    • http://foxeletumirud.iblogger.org/dirt_devil_featherlite_filter_f1.pdfIn PDF document text
    • https://ninitirasaru.weebly.com/uploads/1/3/5/3/135317350/nitirefowafedi_sulep_sisobuporos_jotet.pdfIn PDF document text
    • http://betabudon.iblogger.org/business_in_one_box_free.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/8a1412c3-9cbb-4724-b8ef-97994b2eb093/dosidaguzojunutinur.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_511f9084166a46998f3f7fc835bdc59f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d317e7e8-7123-4b17-af77-b652bc72f2b0/konica_bizhub_c224e_admin_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/506c9a60-dae0-43ec-bbc0-a43461786784/what_episode_does_asta_get_his_grimoire_back.pdfIn PDF document text
    • http://mofuvuziwoloj.epizy.com/panasonic_kx-dt343_change_voicemail_message.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/hreflang_google_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/windows_7_activator_free_for_pc.pdfIn PDF document text
    • http://mefabimunusor.epizy.com/21752247176.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/likojeratogeziselel.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/53395884900.pdfIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_075b4a64f90c444c98be4e6b0171ff7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/grandview_heights_police_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/fupigupododizetesogejori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5bd544b-8dcc-4ea5-8270-6491b47b45b6/gepefiponamukizina.pdfIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_37ce3a3f3c3742cbb68f2fbbd5866036.pdf?index=trueIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_58abd7f3acda4a74bb85840f7e2584f8.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BD 5964 bytes
SHA-256: d09cd91396e5d8dfbef0ae2218dffecdcaa812d00454ba12ba59a641776c016e

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