Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9b0fc654752ee5…

MALICIOUS

PDF

90.8 KB Created: 2021-08-09 00:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a3db6e2abcf9d2f03135875a5ddc9226 SHA-1: 9807e8ff7ae21608f25308d454a5fb79f5ad38fc SHA-256: ba9b0fc654752ee574c27946f421de969f469dd92d03c9cf4e88a3013353ed17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/c2fd2fd54cc4c6e0aa798205c8c9329d/xaxuzuzogakutikumakam.pdf In PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf42c4b5e74---29691101225.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/53a7c377f00289338dbc3b6a322647af/8700237887.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/sujorodutuj.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/eodb6vto3tle91c5itc8dqt6f2/5746492201.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/gvfdjq11n1ulgp3dbe0po8gqra/11186466214.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/vuvanabana.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/gopoxobakafad.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/matunefevisitodopipagutab.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///55102610419.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/e280c76e33f784a4ca0e0d7f573fc982/luwabivomel.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/36790408404.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/1h3vpe7fp6kv0a59velvm2ad6u/voren.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/j08ptje9o7bael8l4nrrq28icu/26632146383.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/5024bdf9a2c754aeefed7a699fa7c2cd/wazenijugozafaruse.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/faremuvizere.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/10347175965.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/91424703030.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/lowepolimeso.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/13915763459.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/45188369391.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/qe2kbsg5qslidab25r1e7kt7df/73097113325.pdfIn PDF document text
    • http://poorclarescork.ie/images/felutimugobevokevo.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/37873906356.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/e115395aa625a3d3e91beac7a176560c/torowepa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=dr+ramazan+kurto%C4%9Flu+kitaplar%C4%B1+pdf+indirPDF 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_off0000fa21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 18932 bytes
SHA-256: 27165ed6c9c97994b3e98a2afb6fc70a31333984aead93a761e44520ffe5bec6
font_01_sfnt_off000128aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AA 10892 bytes
SHA-256: 51cd91ec659d56b446f957d655da1d26926d890572f1723b6d7ab19b06f67312
font_02_sfnt_off00014195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14195 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1