Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6575946e821cd96…

MALICIOUS

PDF

83.2 KB Created: 2021-09-08 12:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bcdb742dcc12538cb001d29e22e9e83f SHA-1: 4caed9352a9010cd5a82aed931c9cbd5c54197de SHA-256: c6575946e821cd9605a4ff178ad8adf630cabdb26a7d9052b94c24e98d98e03b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. These links are likely intended to lure users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://queure.ru/uplcv?utm_term=alkyl+halide+mcq+pdf PDF link annotation
    • https://pathakpharma.in/singhania/downloads/file/dumogusam.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/074a1c7b68219bb54c64be4e0075ab85/54231153530.pdfIn PDF document text
    • http://fanghsin.com/uploads/files/202109021433519965.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b42731877a---8762989336.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/35172406423.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b766868df57---88694755241.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef619c6a1a---21573136029.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/ponudexoji.pdfIn PDF document text
    • https://armenia4d.com/contents//files/13793090495.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/56484714691.pdfIn PDF document text
    • http://gomientrung.vn/uploads/image/files/29368352849.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/rajtacvmtdih5kjvhl60mtpjqu/5392278281.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5f6a51034234adcf6b43eeead93b60f/sasikafazexobavaxugabesaf.pdfIn PDF document text
    • https://leganordavigliana.com/uploads/file/fotetovuv.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/gisejesulog.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210616143809.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/nofuxalesapipikovi.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/galutuvonitexurori.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210804181617_86ezhd.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/31276875870.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4088b0eca---71765842174.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021060315312973499.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/damuxujasobuxuwugeziwa.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/wumiferaduxesemokijupiwut.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D2 18816 bytes
SHA-256: 968cbade220abdf840ba0917d50501fc50780191134ff57261e7ed22cf1c6a3b
font_02_sfnt_off000126fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FE 10628 bytes
SHA-256: b294176fdf2233aa410b6cb8c8ba34a4990e0f303d0bfc42353a3986866c5ae0

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