Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1205ffbe1d8b380…

MALICIOUS

PDF

91.9 KB Created: 2021-08-17 18:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fe0ca3f06b0b85062e164f554ef69be3 SHA-1: 5305b187f80939719e44e13eff1901d47b6ad22d SHA-256: a1205ffbe1d8b380abdeb1f854488e4abd6609ca80715d3effb1d1c51130369e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites and disposable hosting domains, likely serving as a link farm for phishing lures. The presence of multiple PDF link farm heuristics and embedded URLs strongly suggests an attempt to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=taa%C5%9F%C5%9Fuk+%C4%B1+talat+ve+fitnat+kahramanlar PDF link annotation
    • https://foulardfotografando.it/file/lasisojebu.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607221f0bd154---kekepixagiwewige.pdfIn PDF document text
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/lejosatomorutulebobip.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/tafajutu.pdfIn PDF document text
    • https://uniontend.com/userfiles/files/17178159156.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609005d054f73---48915374897.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5de381ff5---goberigako.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/vinogofoxukuruf.pdfIn PDF document text
    • http://cityhighclassof77.com/clients/9/9e/9ea685038b5a197d2022a69b8c6b162a/File/7527682245.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///fubupizabakafefef.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/gpm8do3mpc3s1j7fkfsr6dln4q/fedawexamopefa.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/49854522826.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/61642164222.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/4fb6a40681b5107ef7cff1bbb845ec8c/gumunumirediw.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/84358732188.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2af9e672d---nixavovatujemaverebulaw.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607031c4911ab---78341939147.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c5372743e---buzixusirogexagiv.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/woraze.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/514f1636ae36e8e646a2841f8ee3a426/kilifivuxurezetatebuvison.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/vesifipolagik.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c3ab54bee---14799115302.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/81183052199.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_off000100d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D1 18896 bytes
SHA-256: b59929af24ba77df70ccca8d3ba036e0904e05abe77208324e406a091ee028b5
font_01_sfnt_off00012e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001466d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1466D 10700 bytes
SHA-256: 85fe33b96753c96e6c3d7b0c591d22b3b582cb8b41f084ede848a1af9cd3341c