Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9a595011a00763…

MALICIOUS

PDF

80.4 KB Created: 2021-09-05 05:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f9621985fedf6f33205f32ee439ac39d SHA-1: cabeb0aafebbd8f55a84674c2af9a0b63f514411 SHA-256: 3e9a595011a0076327a2fe1ce6d5f2280638cc796e5efd4b1733044f13bf1802
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to lure users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/g04u457etkvghfh74eumlm78q1/gesinawegululemi.pdf In PDF document text
    • https://worldcastlive.com/userfiles/file/49068236923.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/denakaditesumedorovamefod.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/vimeboxig.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/5vf5nnr7h1ohnbasbejj80aum0/55882311469.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/sogatavesixebigesego.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608808894d1b2---nezemuzakenuzujomamifumun.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/317166b713c112839c4a54394c2321ba/wipur.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/5709be99549600cb79e1093e9102d72a/rozineva.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/dupekuwubasiwixore.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/eee9e02e54b8c549df8c64e9f9adea2d/91521442429.pdfIn PDF document text
    • https://superchills.com/userfiles/file/tivirobipanidod.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df0ac6dffc---94843096720.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/tovububagimelelekopuvabe.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/f5c12f0a9ac6bcc2a022d363b41f7c46/penuniwulu.pdfIn PDF document text
    • http://sobsai.com/ckfinder/userfiles/files/jixog.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1e4221e70---69903833222.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/919b5dfb84821f22fe0829351d1e5fd9/52630298372.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/57247723050.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/eda3b87b5e4bd0a5fcaf0e5b7e950af9/89549196987.pdfIn PDF document text
    • http://lohs69.com/clients/82366/File/gikajekotafa.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/zolawofolimo.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/libututu.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e744714ba---68815491371.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=build+order+aoe2+pdfPDF 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_off0000d0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B1 20580 bytes
SHA-256: 7cff16eb6faa18af4a98e383b8272df27bcba25c1e7bda6c90e5e0c0fc319a8a
font_01_sfnt_off0001047e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047E 10396 bytes
SHA-256: a270499a9c16b883084008ef30134360981a137b11c92508d98426529cd168a5
font_02_sfnt_off00011c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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