Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab68b0eb38d3bc2b…

MALICIOUS

PDF

83.9 KB Created: 2021-08-07 14:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 82bd6100c70992ef26d1c940837f85fa SHA-1: 147e7b8168e36b3700600606174805da56ea7d34 SHA-256: ab68b0eb38d3bc2b3a4e2cb07803e148bbe1a94d50142b29deaf2a65032c7a46
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078a72360cfa---36889901384.pdf In PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/8962d8f9860a9e63bece7c5892b18c66/30240259181.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/80cbdad2d08dc7e443fc531e5386cdd1/ludibajoxukek.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d55b8b960e4---fibavavopoxowubaragivex.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/77667511835.pdfIn PDF document text
    • http://www.kilincsweb.hu/fileok/file/navakisosegidofizulezixib.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/483eb45d01f3d699c4e1d3f7b1ac0ce7/83526984006.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873d3808190---6656658986.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c79957d2893---lijowezozofolibudes.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cd9d2942766---92534419380.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/fojafasivupijisaragu.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/d7kcn8bofqtoehhhjsocknnn77/sitimivenijamizebimot.pdfIn PDF document text
    • http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/ladugidizegokukozax.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/fe71h5rjd78nq441ftk2ue2rvs/rijemavajiginazasar.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/58573523181.pdfIn PDF document text
    • http://hasyo.net/files/file/jerubuwosaginibor.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/vuradosotamizolusip.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fuwugidofopokif.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/91842663536.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/67572067155.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/86787860250.pdfIn PDF document text
    • http://doer-sh.com/Uploadfiles/files/68736042366.pdfIn PDF document text
    • http://nhadep30giay.com/uploads/image/files/15255689272.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/jobanofulisililivoj.pdfIn PDF document text
    • https://meccanicagambirasio.it/file/levoxefarinorotibeja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=ncert+class+7+science+book+pdf+free+downloadPDF 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_off0000e58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA0 16144 bytes
SHA-256: 95326a89102b06c94bd750a8558802121caa5bae5bc3b3dc7584878670106653
font_02_sfnt_off00012780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12780 10960 bytes
SHA-256: feaf2f15fe92ba4cfc64ce4c3be987a6005b859b15538ec5b9bbfa0d9d641b09