Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49ffa06b8250b2d…

MALICIOUS

PDF

91.5 KB Created: 2021-06-30 23:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b970776579f390c8eb8f36a918d68a9 SHA-1: 725286c054b199fa7b8fe5a82e6dc8e5c18d3344 SHA-256: f49ffa06b8250b2d57ffd4797c25b114ff0765b29afd41766ec0147df09c632a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggest a link farm designed to redirect users to malicious sites. The file's structure and URL patterns are consistent with phishing lures or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://queure.ru/uplcv?utm_term=most+fastest+snake+in+the+world
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075accfcc1df---15970489174.pdf
    • http://asckhn.com/acskhn/userfiles/file/78636972604.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/d2ca22e8eafc358493f389312660725e/ziziwutafepugola.pdf
    • http://prosquash.by/data/85064509224.pdf
    • http://archi1919.com/smlclub-files/file/jugonivoselumuzet.pdf
    • https://dcoderesearch.com/uploads/dijifoxa.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160af55ce9a8ed---keladotafosopenivu.pdf
    • http://harissarantis.com/userfiles/files/46580335240.pdf
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/11351859432.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/p3f7fht58t4c4f5fnvluvke9a0/78199243793.pdf
    • http://thedewakohchang.com/image/upload/File/utigonuzez.pdf
    • https://alianzatours.com/imagenes/file/rigatiworizodekevuvodadi.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c038d157c48---80412627877.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/6fb9a429b504d690669650aa806e685e/84459997418.pdf
    • https://toppelletmachine.com/d/files/dekuloxuxisukeweb.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/1cf49c379e979d8bd6b24bde0d6136e9/febuxafaveran.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bddfba1a326---bajamuguworabubususabefo.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160865fb3d4343---faxalowebab.pdf
    • http://akhsmombasa.com/clients/861898/File/lewukanuwamowilekusazu.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160897a5fec63d---88810521745.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aca09e6f4fe---60124202345.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f86c709ce2---66216663636.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f204b9eff7---58848047865.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7ucc48sc1ad3ua6ge0nob63bef/pisomadozemurojobul.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1c0fe035a---70461821253.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff17.bin
73cae89eb989480690a7a50f1244c0f6c87be79f2f4d2e4118c5f1f62b10adaa
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF17 19368 bytes
font_01_sfnt_off00013061.bin
51156f554ada7d2a32580d12f1c8f30096ae40324ca65e92887e7bda47e0fa46
pdf-font-stream PDF embedded font (sfnt) at offset 0x13061 10620 bytes
font_02_sfnt_off000148b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x148B3 16792 bytes