Malicious PDF — malware analysis report

Static analysis result for SHA-256 4682d9d89ba31c3c…

MALICIOUS

PDF

135.8 KB Created: 2021-06-26 03:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2a2a6b46b47f031e7029fad96425e34d SHA-1: 65a12dfa4fdd0893200c403d5e06f4000983b7d7 SHA-256: 4682d9d89ba31c3ca0714fdd9c3987a65b84bf19819e0943106497bd5b49cf40
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links pointing to various websites, many of which are hosted on compromised WordPress installations. This structure suggests the document is designed to act as a link farm, likely to distribute phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/3jnu91r5qc6aht80kuuhkaf2u7/gubakenoko.pdf In PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/h51p9rrh71f4m3nkr0n2qgfgrk/76586081338.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd3281268d---ludanusimod.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/def2b8da2714e216d383afd9cf27e259/jabumuga.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d48fdd9923---47529583984.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/raraxabux.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e337b8893c---tagixapepeg.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607bca43e2cb6---ribasitolofesoxibajit.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/cc02qhhd68d8cpfgqoudjthvqq/nulonakupufowakufixo.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a0617c5fa---piligoxofatajilogas.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160931daa5086d---93171783657.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606d62323d303---bitetopide.pdfIn PDF document text
    • http://olversonfamilyreunion.org/clients/5/51/51a48c89da211807e19ed56f8a1a1822/File/87778267413.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210510060154.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/272e01e6804dbb260084eab5b66a2f14/7700858776.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/luql1hqa6d1hi9l3kl8g3vtph4/relatexesutuzile.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/fofisale.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/puxagapip.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/t3m4aukrvjhdcihmo4r1td90a1/1768702558.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b00353884d7---jelasoxagalapurikobet.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/096615889938dc9fc26ea2b4cf40b2e5/wetelokilowuf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608361a3035a6---gixaxesukirurufofijolove.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/04b5e3c956a3234c25b0467e8804a8d5/45897022999.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/26692012494.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/bekumesonofoxukozokatil.pdfIn PDF document text
    • http://refta-bg.com/userfiles/file/36565099439.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/e4e958caa83e351815793d85e548caf2/zewapak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=plane+and+solid+geometry+problems+with+solutionsPDF 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

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_off0001a6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6CA 22840 bytes
SHA-256: 1cc2182f399fb396f1fd0c8e982e77803b7540c9e83d06926b3c989940e13452
font_01_sfnt_off0001ded3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DED3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F6EA 11280 bytes
SHA-256: ab7417269367d24b675f6f03bc5d10c4237137d8ce387a8546468ca3eed0db81

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