Malicious PDF — malware analysis report

Static analysis result for SHA-256 89715a8d86499388…

MALICIOUS

PDF

72.8 KB Created: 2021-03-25 16:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 28f0c91bf5868762e96657939fd22cef SHA-1: 190e3f2e9440a65256aad4b686a0c4a26b4b3f07 SHA-256: 89715a8d8649938840815bc6d2f28b9912d3f4dd245ed5d23e4c3c46c1d226bd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://kuzutuzo.ru/strik?utm_term=roland+spd+sx+price+olx PDF link annotation
    • http://domifonupesif.iblogger.org/avengers_endgame_thor_images.pdfIn PDF document text
    • http://pegejoruvufiron.sportsontheweb.net/arrangement_of_teeth.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/ligosasavivuf.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/arabic_to_urdu_dictionary.pdfIn PDF document text
    • http://sopesukenapad.scienceontheweb.net/pitazerodoxanoluxexunelam.pdfIn PDF document text
    • http://pifowovumuwe.medianewsonline.com/59139495293.pdfIn PDF document text
    • http://dokaxirugik.medianewsonline.com/raymond_ackerman_biography.pdfIn PDF document text
    • http://kutivuxugufif.iblogger.org/symbol_ls4278_barcode_scanner_programming.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sixolose/73463255072.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/76373926195.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/windows_10_pro_1803_update_offline.pdfIn PDF document text
    • http://tadidej.rf.gd/teori_komunikasi_behaviorisme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42fa98b2-ba91-4853-899a-90f806e78085/line_6_spider_3_120_watt_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87cdb923-d394-4655-b7af-4333482b6f8b/bravo_points_redemption_first_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf555696-cc16-4765-9b65-d88bcdbafcab/longman_advanced_learners_dictionary_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c775c92-3000-4b23-bfc7-c9390cc95d25/how_to_write_a_profile_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/bole_chudiyan_video_song_free_hd.pdfIn PDF document text
    • http://xujariju.epizy.com/java_programming_basics_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d7a7b8-9667-42fc-ae17-775457f8668d/mcgraw_hill_wonders_1st_grade_sight_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9891b26-e6a0-46bf-99db-12c969821b9c/how_to_do_limits_at_infinity.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3C 5144 bytes
SHA-256: 7ed8b6fcbac0f58c9b637166d123d97a17c9b71bc8e5fe31853e3231681ccb08
font_01_sfnt_off0000dcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 10512 bytes
SHA-256: 6fcc2d46de801ed2874c9e57b61be2c0ba40021f850b7b2c9f40f20bc1543217
font_02_sfnt_off000100e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E6 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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