Malicious PDF — malware analysis report

Static analysis result for SHA-256 595501f00fa1edfe…

MALICIOUS

PDF

88.4 KB Created: 2021-07-03 14:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7ab5bf44a01175f3641b8cff67a7c50f SHA-1: e8a9dbe2158f5a1064ea90dbb259ea57b5444457 SHA-256: 595501f00fa1edfe8f048bc304d7bd8c5d6e2bd67796836ace2a90b424e8b446
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure suggests it's designed to lure users into clicking links that lead to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/e016541a851751f848b5fe4dd349acd3/julirexivorawigoz.pdf In PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076049bf2912---50836759244.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/jokuvitafajexevasokodop.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/28163309432.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e4687367e---jubuvibawow.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/25447077131.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/s0jen5juhd0f07j1pmo6f7slb7/wixoromus.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be186ea8c53---nesexaso.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/robizenaloxeda.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/vozekegatorixavi.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/mipizogurekeriwa.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/fb3ac97c5e2a9b7c936a80266acfc1c3/dixikuwosezufifeboli.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210528_076F7ABB75EC8416.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f81491aabce2871a85db40f58b7629c7/9395023353.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/15b9ab9c22f74712ff809b14d778c0ab/dodijudejesadawera.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c2fb762de---87590666002.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/33987566935.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/vibamadunenimikonugogaba.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753816cc407---95119033693.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/mabirozogunanij.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/caf0d2019ca3690b45e95a0df0d4cfb0/kanodisefifefutolo.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16086efc41822c---41383578084.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/d4b1eca8e08542f3075c33c27909f136/dinowi.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d13e9d99dd---83261272292.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/fafaponegupuledaxofugoje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=rome+2+campaign+tipsPDF 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_off0000f66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66F 10736 bytes
SHA-256: 9387654ba97ef312f8056b2596c5e9e3b4ff673f659ebf101e6e1a30ae3b0989
font_01_sfnt_off00010f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2F 16908 bytes
SHA-256: df2cd361b72c4c0f8ff42f873d5f3d5b5ea324bb761d4cbcf4b72d97c4c72cfc
font_02_sfnt_off00013af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1