Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dbe9d2ef9ced860…

MALICIOUS

PDF

98.5 KB Created: 2021-03-04 15:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d214959b3edf179c8adcfdad30c1b36a SHA-1: f7fa6b266a4e0ea4a514599f3fba2ad131f7837d SHA-256: 4dbe9d2ef9ced8607357baf935d5b5708dbb9d4c8f9e3bb1be5ca988173cc9ee
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The document body, though partially corrupted, suggests a lure related to retrieving Snapchat messages, directing users to external links. The presence of numerous disposable domains and redirector patterns points towards a link farm designed to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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/strik?utm_term=can+the+police+get+snapchat+messages+back PDF link annotation
    • http://vengriya.space/yahoo_mail_slow_to_on_iphone87k34.pdfIn PDF document text
    • https://cdn.sqhk.co/zujijivopuju/jjjwDxW/fitbit_charge_3_screen_blacked_out.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/Sgdgfjf/old_keyboard_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/nivatasob/F15ghqD/ruwobapizivopikiwimi.pdfIn PDF document text
    • http://petersikdar.com/binol1wred.pdfIn PDF document text
    • https://cdn.sqhk.co/nedovipirumu/Jgfzjjj/chicken_chick_wallpaper_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/Fhihjid/hidden_object_games_free_for_mac.pdfIn PDF document text
    • http://yourdesk.website/jawegigujolekesadojufuurdd.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/5gzhfha/sutuzumodoma.pdfIn PDF document text
    • http://chtotakoebezuz.biz/wurapitisafakofuxurifnfk0.pdfIn PDF document text
    • http://getcreditreport.info/81955505125ejuz6.pdfIn PDF document text
    • https://cdn.sqhk.co/nurofiwele/mgcicjh/50744281564.pdfIn PDF document text
    • http://bigchance.pw/giant_jumble_crossword_answersno1b5.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/fevobelijogal/62808691994.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/bluetooth_for_windows_xp_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecc75bdf-0826-4038-b8cc-fdb4a193cc33/zotekos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35d543c-115f-420c-b9e0-730898db7d93/merchant_of_venice_sparknotes_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/498b0a33-dc37-41a8-87b9-5e1d0b4c0c80/what_are_the_four_responsibilities_of_the_president.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47071112-9eaf-4396-bda5-9144cc76b64f/air_force_ranks_us_army.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/aws_s3_presigned_url.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e20d690-9234-4557-8925-0ac82802adf9/51413651784.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/mixture_and_alligation_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/cheer_haran_documentary.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_off000141fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141FA 5360 bytes
SHA-256: a003ad261b5a3ab2e4e48d7bf2cc09aa93f42a12a424af968a32a2d3cb9e58bb
font_01_sfnt_off0001540e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1540E 11916 bytes
SHA-256: 7e2f5de03b38c5c30c45de21173354ca8b0434b47e25eeea66921ec7d8b6ba72

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