Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f017e49309431b…

MALICIOUS

PDF

74.0 KB Created: 2021-09-16 23:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4d3ebaf8739268d5811ec89f914d4f2e SHA-1: 77aee9dc704588e1ab621b3a2e0df79085fde4c5 SHA-256: 62f017e49309431b1e607e51a9e5bae7cd80f184b5cd20bcc5d8eb6cd81edc40
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, with URLs containing terms like 'tradingview premium apk cracked', suggesting a lure for potentially unwanted or malicious software. The PDF structure itself does not contain executable scripts, but the embedded URLs are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://coretry.ru/uplcv?utm_term=tradingview+premium+apk+cracked PDF link annotation
    • http://alpha-cp.com/userfiles/file/36562933521.pdfIn PDF document text
    • http://15881588.com/ckupload/files/23473733959.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/69473118215.pdfIn PDF document text
    • http://fundacionecla.org/resources/original/file/vipofafuluruximatojoru.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613daf6293a46---73712770339.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/61269420048.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/fupole.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/megobefu.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9814f20bb---kaguzu.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/01433a77c03fd1360f874789f879cdc6/10141458389.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/50108639696.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/gokine.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/70067764389.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cba2d189c3---duruduj.pdfIn PDF document text
    • http://obkladlazby.cz/userfiles/file/83748305892.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/51663683897.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f81b37b80d---29492425710.pdfIn PDF document text
    • http://edins.net/userData/ebizro_board/file/tagasosasuremiledu.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/31510228666.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/48955053852.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/jaxufidamitileli.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/nubiwajef.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/9947e7d2b2cc9c4d630b8567b63449c7.pdfIn 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://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_off0000bbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB9 10732 bytes
SHA-256: c810465a142e7d6f141d1514ff6de95fcced4881f7370a487b7b5b35ffedeffd
font_01_sfnt_off0000d42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3D 17652 bytes
SHA-256: 1a4a4588a67f623ae36cf8608d5af19770f0cf85943f8e1fe06d2a8bffe13765

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