Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc701b753306a35…

MALICIOUS

PDF

137.0 KB Created: 2021-07-23 01:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 95e5c02a911fecaf638a3a51569ff821 SHA-1: 9c5994f0e92dbcadbb17ee8e6a82fa32ed1070b7 SHA-256: 0fc701b753306a35e9400735c597c22fd631e87d54b1a7c26a0504e2115bb899
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 CMS uploads or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the primary attack pattern involves directing users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • 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.
  • 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 http://alhouti.com/userfiles/file/nobasiwazekepudizij.pdf In PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/8rgh4u94o3dfbrqpf8k6rtj7q6/64913825992.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/68809498165.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f51d7f47a---ladabaxavuruw.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/20245382342.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/32e927b931a7f0277921cca8eb5837bb/41125128189.pdfIn PDF document text
    • http://lukinserv.hu/file/68868220262.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608af013f086f---37850758357.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bbefeecfc0f---mugewedubalakubagumuseme.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c09e8d9b48---12490404038.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/9d2fbbf61bff08a193e1176257a56cb4/113997250.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/423f28e4fdf25e444faa092844e0f93f/9124298838.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/790bbe3713817182641f882936847941/nanam.pdfIn PDF document text
    • http://greenbrier101.com/userimages/19098856607.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b9dc212f3---mosezove.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985ea5bedfc---50119071528.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/dodudizeda.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/lumulofisinawa.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/xeveveliw.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/57825696834.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/jawufaxobironaxi.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/54341008939.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/7a76909830f48b496358a0087dd20629/pekumabi.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e2a0b5a8c---kidamapuno.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/3821924210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=download+novel+my+ghost+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_off0001b645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B645 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001ce57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE57 17816 bytes
SHA-256: 052785f56e9c3296b421d4dbbdbedea810338bce1b0c35b06e96f482ff4b4a47
font_02_sfnt_off0001fcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FCC0 11020 bytes
SHA-256: 86a9af8d6b33692f43dd635169b5245f7fae6ddc9652c83ff66c53c4daf783a6

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