Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1527ca3dbda9c3…

MALICIOUS

PDF

229.9 KB Created: 2021-07-08 07:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: ddd5ac49301a0c4401b190373f9dad86 SHA-1: 7c88c57e6fb6d591e31dff509ab62568a60b024a SHA-256: 0a1527ca3dbda9c3d20c057f7f6102f4713fd827b7e87712c274abc2c893558a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple links pointing to compromised WordPress sites suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point to a malicious document designed to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9008

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a147b9e4f90---3620170651.pdf In PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/penljc4f3e3rpfijg27mc6243g/6534691394.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16073a21fe153d---zoripoxivilanenopoponami.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711405b9414---6770887818.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/58589556349.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/so85gc6fs8savn6ngl68r63c3i/gulubojoralaki.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085a2efefe02---10990622882.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/rejivuguzokinoj.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5f27a160dd3acd3848cd3f04e1f7a920/7900140276.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077a346deb13---50951049184.pdfIn PDF document text
    • http://reinforcingourheritage.com/clients/0/08/0860c2a235168fe7e4a745c824023bdd/File/rabixogutugug.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/81436373472.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210528_C79A4BE3C89744DE.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/1df387a9ddfdcc40a8d7141368e4b9b1/rupekomewoporenina.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0aad404a31---10577684036.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/siwegobaso.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/99964178596.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/kkp3s4qsvqpp5917ak5h6ur2v7/83350882810.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81ed5a0de---78846752041.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf41d2eba9---megav.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e60d6bbcd---93634771327.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/tojegofuvarudutupeditabe.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8adce0e39---7151080531.pdfIn PDF document text
    • http://rentaruedas.com/files/others/lemilatogu.pdfIn PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/36620808967.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/wowixatewedexeras.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=1+lm+to+meterPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25E9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000276b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x276B3 9696 bytes
SHA-256: 2edb99dc51969b88c0520a059c10ec3f851d151e4b9aeb6c07d493510f18acb2
font_02_sfnt_off00028bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28BD2 20456 bytes
SHA-256: 8ef5cb7293ada4fc9bb2fbd65bb330ea8624730a9fa6f3fd8d3cf6d48f1e388c
font_03_sfnt_off0002c130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C130 78492 bytes
SHA-256: ce5c7d8835324bf1775699577e640fb3b186064785124581346e68ad7a69b98d