Malicious PDF — malware analysis report

Static analysis result for SHA-256 d212472f67cd4c1d…

MALICIOUS

PDF

71.0 KB Created: 2021-04-27 06:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bc1942d0c9fbd5556d0c2f1a28c202dd SHA-1: 58ef58cf3495a41e95725c8762d3469113b60eff SHA-256: d212472f67cd4c1df8f952f8e024087169873d440c67710698de02b58264f598
226 Risk Score

Malware Insights

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

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 0.9991

Heuristics 7

  • 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 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=sig+sauer+legion+compact+sao PDF link annotation
    • http://tuimag.ru/tatutesepi6ki.pdfIn PDF document text
    • http://bivozebavi.iblogger.org/alphonse_elric_cosplay_template.pdfIn PDF document text
    • http://zalavsky.ru/bazenew377ai.pdfIn PDF document text
    • https://gutavavoz.weebly.com/uploads/1/3/4/0/134000423/3648937.pdfIn PDF document text
    • https://sipovabamekejo.weebly.com/uploads/1/3/5/3/135391609/ec16ae7.pdfIn PDF document text
    • http://bafazoxukiwux.iblogger.org/peptic_ulcer_nice_guidelines.pdfIn PDF document text
    • https://pelabomorifij.weebly.com/uploads/1/3/4/6/134628360/4052223.pdfIn PDF document text
    • https://totiboliz.weebly.com/uploads/1/3/4/8/134897880/gisofawimowame-tojigak.pdfIn PDF document text
    • https://valodoxajub.weebly.com/uploads/1/3/4/4/134435871/3fa3127970.pdfIn PDF document text
    • https://vopezewom.weebly.com/uploads/1/3/3/9/133988608/wenofigipitifa-wixubiranab-javuzilitov-wejep.pdfIn PDF document text
    • https://ziropiwos.weebly.com/uploads/1/3/4/3/134311351/kevolekizufi.pdfIn PDF document text
    • https://povominuvuz.weebly.com/uploads/1/3/5/9/135961678/rujupisaxobu.pdfIn PDF document text
    • https://widosogepe.weebly.com/uploads/1/3/3/9/133986955/semenek.pdfIn PDF document text
    • https://guleritep.weebly.com/uploads/1/3/1/3/131383493/a8e3cd056959a2e.pdfIn PDF document text
    • http://privateguardingserviceagainstdanger.site/how_to_analyse_5_point_likert_scale_data_in_spssjb3zf.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/978b9882-9925-42b7-8012-6ee38b1cbe4e/garmin_etrex_12_channel_gps_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a1456b-2e3e-485d-9f14-f9f302057f37/xerojagezuwabunamosuvikuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a9a7a05-c5b3-4721-8045-700beac97b29/strengths_and_weaknesses_of_research_articles.pdfIn PDF document text
    • http://kirizuwapizu.rf.gd/vocab_workshop_level_e_unit_5_quiz.pdfIn PDF document text
    • http://masosoxejonejov.rf.gd/mogaledivugoxeriwipinuf.pdfIn PDF document text
    • http://rimutapewite.rf.gd/corporate_email_signature_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83880d8a-8c9d-4da0-b3b5-e7bbca1a260d/powermate_3500_generator_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0416e2a-6b72-4c7c-933e-b9d929f21be3/lights_out_2016_full_movie_download_in_hindi_filmyzilla.pdfIn PDF document text
    • http://talakukatutevib.epizy.com/vidmate_application_free_for_pc.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_off0000d4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A9 5356 bytes
SHA-256: 19d6d103795caaa987a51eed2c9f780c3ec28076714a6185b83b665e87082738
font_01_sfnt_off0000e6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CE 11096 bytes
SHA-256: 12326b0f95cdd64a30c54837be803f018455706ca492339bc06f714b88f1881c