Malicious PDF — malware analysis report

Static analysis result for SHA-256 10903acb762fba59…

MALICIOUS

PDF

377.8 KB Created: 2021-06-30 16:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c49253741827360008388b30dde01422 SHA-1: 8a9ea47652c0662ee5744de820c00dc3fe06af7f SHA-256: 10903acb762fba59c58889abc29ba19016588d927d16dcbc42290a5550fd0a28
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The sample contains numerous links pointing to compromised WordPress sites, which likely host further malicious payloads. The presence of these links indicates an attempt to deliver malware via a spearphishing attachment, leading to the execution of exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8589

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
  • 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.
  • 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://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c04db7035b0---62993187661.pdf In PDF document text
    • http://richardarnoldalumni.com/clients/a/ad/ad1dcfa6f69ac51e3fe6bec18f6cf6d6/File/45366572644.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091686a1e82c---29493734471.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/3h6q9ht3l5fl6426q0hv0388n6/razolutilururepus.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/9d74a8ea15e165b82e7481bfd9a974ba/dadedawepagafularagiran.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4526d6b4d3---nupurixobupos.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609241f16aa4a---33457432135.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/0abe96445b24dce6c728fa3522ad1859/3474067118.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31c3456e81---38750603258.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607353de29cd1---61095171506.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/otj0bel0bss5trbakkd9lngn5i/zodob.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160c97348bc239---34349539631.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/26913462671b69c41c8b7b266415eaf8/nifamufakilebup.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/tojomezufaziziluwojevu.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/85099130058.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/dakadopexovugi.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/kutiwezabiw.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608b67a41ce03---bofowizasitejamo.pdfIn PDF document text
    • https://csn-alliance.com/data/files/24484372612.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/40654692759.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/a34cec04810190de3d755cef4b7ad6b0/51328596960.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/32b6901f00d9555f2da6494d0c75cc03/xaxid.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16071a0a83afcc---zesiwesibuviziwoguwaboges.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=tamil+dubbed+malayalam+movies+download+in+isaiminiPDF link annotation
    • 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_off00057505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57505 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00058d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58D1C 10680 bytes
SHA-256: 7bbfdda10413a143a9ef614223a3f2874dd99ff9d55a6d0a6dfa8b58164b21a3
font_02_sfnt_off0005a599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A599 19336 bytes
SHA-256: 3e3a3cd0ec6ae0441db5144cf98d11034904b8b88316e66920e87703fed4e6fe

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