Malicious PDF — malware analysis report

Static analysis result for SHA-256 460757ed13711699…

MALICIOUS

PDF

88.5 KB Created: 2021-07-14 00:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7244af9fa3a4fe4eda9ea4adb4ae0a4f SHA-1: d66eba09f64b6d8cf38dbfb824de5d8dd03ee75c SHA-256: 460757ed13711699c442d1c4432ddd861c68a3d8f65447674f69c96455341aab
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 or are part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The document body is heavily obfuscated and unreadable, providing no direct content-based clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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 https://binarbaidfabrication.com/public_html/userfiles/file/35989383062.pdf In PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c866079c20c---wusef.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/383kfu81f3tgvls1nmb3c9s0i1/puwubimijogimajebobod.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/xazogewizenixino.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97367b57ca---39843012553.pdfIn PDF document text
    • https://baongochoa.com/upload/file/saxegojomepelopox.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d13d26cf2---32191521663.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210621061020_dpvp7m.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d35b8e54255---bisezawisokekamifug.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/p2h9qfc1tu1qqnmi0aoc72qhh7/8752835567.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/vasojisavaku.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/cef223cb39fa85a2f46b4976996e9d42/verefawuwosaxegotivi.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/xuvavosulaloma.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/c96bb6316ce61f0726e80c1b1ca7aeb2/maxuzanemudakajud.pdfIn PDF document text
    • http://www.520amis.com/upload/files/nafufugizisu.pdfIn PDF document text
    • http://phsclassof1970.com/clients/875774/File/fuziduxogud.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad05587b307---93715094672.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/56f363a7f273c52bb4c80dc9a0344e39/xuvula.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a11a7765c94---ruwunijodovagakaxigaparoz.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607116db61def---21747792362.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/17ff4f7fa7c73a67cc021d2bb93f8da6/70217986373.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/99046254565.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/jolebajebuvenagetasirudam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=cbse+class+12+chemistry+question+paper+2016+pdf+with+solutionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88E 11964 bytes
SHA-256: 5a133d113b7ee6f548d291ea54bfd6779dc4c57dd7aa2ba873209e0e3a2d14d9
font_01_sfnt_off000104d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D4 2064 bytes
SHA-256: 46b41152c66239606199adeeb56fa6f0c95586cce1373289504480bb8e1ff93d
font_02_sfnt_off00010e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E37 17476 bytes
SHA-256: d17391654e04ae4cfb0175b4dc5071f1be13d2a920596f51d4f6c9bcdacad79d
font_03_sfnt_off00013b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1