Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a2290f19838d7e…

MALICIOUS

PDF

93.0 KB Created: 2021-09-02 18:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1948453766f2871bf6b7e85f6efb31ce SHA-1: f2044dc2d804f4d306d5e3f5610d08559d4fba00 SHA-256: f1a2290f19838d7ed168630bf0e86f9652ccf69ab6f649e25ae36a394d4870e8
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress installations or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The embedded URLs suggest the document's purpose is to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fea2d5674c0---82622402719.pdf In PDF document text
    • http://fotocaroli.it/userfiles/files/18697037425.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/defobidikatiboxesiri.pdfIn PDF document text
    • http://liily.jp/upload/file/20210828063634.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/topedevopenatipalezexe.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a29ae1d1c---lurop.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/64698398991.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/detotidafuzo.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc192ed94a---8994912040.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/6860710221.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160981802911a6---90442556093.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/selazibibimoxu.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cbbe069b234c21d0483f83c7daaf5c12/dixixurumike.pdfIn PDF document text
    • https://laser123.com/geektic/files/rikibawa.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160f7901a9a283---28622306823.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa27bb7020---17716977889.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/96872037358.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/sj3unsir2c9cj27134fi4ukv1j/lirewudatarozerizobofod.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/53550199320.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/96892066322.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/43cd1dca46d74dbfb7b5ff539983eaba/juliruvinukanosuzajo.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/71734886df8310f4c2c640e5f27a766d/loraxiviwiso.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/d9cfa0bbeaaff11a91c5c4047b1bc291/mavasuxemirujube.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=physical+map+of+world+blank+printable+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

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_off00010540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10540 17960 bytes
SHA-256: 543f28409ab1b17d776c709182f60b4ed3cd8d39c31bf68f89eed2f8975e97d5
font_01_sfnt_off00013381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13381 11320 bytes
SHA-256: beb7004c1c9d1582e377f4170e78dac1979f9a84a8fa7cec163ba459984499e6
font_02_sfnt_off00014dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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