Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae5cb689a96e990…

MALICIOUS

PDF

80.9 KB Created: 2021-03-29 00:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 59a3f1716cb306ded18dc8a37b57aeb8 SHA-1: 98f838697e0afd9dcdf427a44408c76df4aae78f SHA-256: cae5cb689a96e9905ec11cfe284014d5b48b1a3fac225979ef1d87028b7afc24
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/aws?utm_term=the+power+of+now+by+eckhart+tolle+summary+pdf PDF link annotation
    • http://jukojuguvaloj.iblogger.org/noun_errors_exercise_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nodezaneripe/dhc3dbr/96351696830.pdfIn PDF document text
    • http://jotodavusugiga.iblogger.org/dolawabupexodilulefom.pdfIn PDF document text
    • https://nugivukowunel.weebly.com/uploads/1/3/4/0/134041243/cf6e13f.pdfIn PDF document text
    • https://duwizule.weebly.com/uploads/1/3/4/6/134663296/8adda835b0d44.pdfIn PDF document text
    • https://cdn.sqhk.co/vijukifezu/WaI3Zjh/67027775673.pdfIn PDF document text
    • http://goledipe.22web.org/wijegaxobewiguxuk.pdfIn PDF document text
    • https://tapidokebijimub.weebly.com/uploads/1/3/4/5/134577153/5ad22136d39b3.pdfIn PDF document text
    • http://werutofa.iblogger.org/azotobacter_biofertilizer.pdfIn PDF document text
    • http://fadekitexef.iblogger.org/abbaigaru_audio_songs_telugu.pdfIn PDF document text
    • https://bibomezu.weebly.com/uploads/1/3/2/7/132710601/rufipenob_gijute_kofib_ragabaxemafe.pdfIn PDF document text
    • https://wopufibirebosaw.weebly.com/uploads/1/3/4/4/134466277/welimiti-mutiritomu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jasopiwutuv.epizy.com/windows_xp_install_keyboard_shortcuts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a094e7-ba41-4fbd-8c12-99d0ab730120/rekefazi.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/arduino_programming_reference_manual.pdfIn PDF document text
    • http://sedegagagojuwej.epizy.com/whirlpool_duet_washer_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501b8e66-5ad2-41f3-8941-9e75bc91fc7c/power_book_2_latest_episode_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/28756219747.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/making_sense_of_critical_appraisal.pdfIn PDF document text
    • http://lugenofakikale.rf.gd/8750456289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb6055c0-2387-4889-b6f1-2b1c1eb61273/zudogolibifadimilefafot.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/make_spreadsheet_not_read_only.pdfIn PDF document text
    • http://zumoriko.epizy.com/gender_essentialism_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/rugasezejixemipawive.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_off0000fd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD36 5744 bytes
SHA-256: 1b6c7a67ddb6872bd7308e9c99003623dc9c884f08bca7fc5dece5d5d31e7d8a
font_01_sfnt_off000110a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A3 10996 bytes
SHA-256: 6d5f429c4b92d068e4c20f7c7ed5cd6514160cd0b57b0f8f281bff75af4e5e51