Malicious PDF — malware analysis report

Static analysis result for SHA-256 3415dfdda30f8272…

MALICIOUS

PDF

195.9 KB Created: 2021-06-18 05:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 445730e6ea5343e8c36796ccc679ea14 SHA-1: 6a9f7f837c644c2c2259c0fc3b54374528225fdc SHA-256: 3415dfdda30f8272b72c2134a08e835cc40acc82294f325c6d4023567d646f1e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • 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.
  • 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://cructi.ru/uplcv?utm_term=japanese+meme+sound+effect PDF link annotation
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d16a8c235---19408909546.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/hrioigngn4k9jacnmfo7fhpgb1/zojajijiluz.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607252532d9d1---66771077258.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/kimuji.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c59cae979---wudomufuvatu.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16079eeabaf701---88466550385.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/sokimipalufipedujo.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/bizotof.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/91536460323.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac29283b887---79326217160.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/12028955782.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607594e0b1cce---44317269855.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b40a4cdac73---wotimujibetupapizu.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/2gs06kse6e0je13dhlju2n4pq7/toxagejulogakafaloxaxige.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/faporodetejonu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn 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_off0002a5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A5C1 4996 bytes
SHA-256: c8679e04817e769b22e3ef0c51169f5d4a9582fb101c74ffbfe9ece1f4073c1c
font_01_sfnt_off0002b69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B69F 11532 bytes
SHA-256: b63cf2836f3475533209b59065732a338dcf2c933284d96beb2e6ee25a587b49
font_02_sfnt_off0002de1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE1B 16232 bytes
SHA-256: c2f1b8e27e4c5d1eb6694bcf999bed56489d599ed66a9b176e3ad865fa2ee921
font_03_sfnt_off0002f37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F37E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2