Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e21f7ef6aec45e8…

MALICIOUS

PDF

83.3 KB Created: 2021-09-18 02:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d03d56d5986a443e71ea922f6a52d921 SHA-1: 1265a47acf1e4a3d4d37c3511c062bf12f476605 SHA-256: 1e21f7ef6aec45e813e2683cb53594c93241d665ecc4498afb5373dfef0b9018
176 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The 'SE_ENABLE_LURE' heuristic indicates the document likely instructs the user to enable macros or editing, a common tactic for malware droppers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://allytemp.ru/uplcv?utm_term=envoyer+musique+iphone+vers+android PDF link annotation
    • http://imreelectric.sk/uploads/file/bujakuvipetosa.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/8ee0j8et22hnebtt87307ovaa9/30095914782.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412374a03e2---nowegikiwukisutij.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/nhv50dc1pka3o5s69k0dfu35b2/77957616171.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/kiderewotedulukopamatibeb.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca9ccd1a4d---tapuzikaribulama.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/10788151696.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/jonalezojetedu.pdfIn PDF document text
    • https://alariel.be/userfiles/file/94075728469.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/sigegomonoxodonaxukazaba.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2393504863.pdfIn PDF document text
    • http://honghuibio.com/d/files/71593689983.pdfIn PDF document text
    • http://carbonelite.ru/file/87595179508.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/93858932899.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143d70013fc9---fudakovunuz.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/082bf0a29a84a19a31131f4097b169fb/bikewikoxot.pdfIn PDF document text
    • https://maturana.cl/upload/file/nulewilosurigedetujuwub.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/weguvokolewidepuvad.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/46874961845.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/bogedujisonogu.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/sejedotivapawano.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a73606f723---87378839446.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/javomatirepeviwil.pdfIn PDF document text
    • https://nieruchomoscikomercyjne.co/files/file/98087788950.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://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_off0000db64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 20608 bytes
SHA-256: 468aa43aca0a7f0570695a275fcf0ab3ca4e0f2a5807cf6b7f2bdf892a9b5b0c
font_02_sfnt_off000126b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B3 10924 bytes
SHA-256: c92fb54b115225a245349490ba593d55eaee88ea2ecbc5ae834e2791dcf3d498

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