Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d040e6ba3dd0962…

MALICIOUS

PDF

97.7 KB Created: 2021-07-01 18:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 39f3f8da02053c32a884ce8399d06d01 SHA-1: 1e53ee6a66bfb8daa43309d29aeac2fa608052b0 SHA-256: 5d040e6ba3dd09624ac269d6b61fef847f74974548c90f47c752ca1a04935941
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains a large number of links, many pointing to compromised WordPress installations, suggesting it's designed to lead users to malicious sites. The document body is unreadable, but the heuristics indicate a link farm strategy, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d466ae226f---bepofasaludetafaga.pdf In PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d86bf6350a---12909937866.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/cfeed2a6463128d1bb5c676ac4d86e17/97639354264.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/7g56jdk2lb3ko9hedvsi3s5efp/84342814310.pdfIn PDF document text
    • https://schmitz.cz/res/file/78479902052.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/65480944348.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/o5a5vgg9mpu2o7kisktiotij0b/pilowagovorokojazipeti.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/4r1dh47eamb5dam92fgp0r3f6g/zolokovogunevabaje.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/bagf620aoe0g9qg6n56jnklaik/deluvawoparinaremenoti.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/68909620039.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/vupegupetolojojat.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/751d2eb647b9a0dfa246fded837d582f/49962656391.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/160171dd1014e849575e363b55069f11/8218545110.pdfIn PDF document text
    • http://novichiha.ru/pic/file/73194041749.pdfIn PDF document text
    • http://conroeclassof72.com/clients/d/de/de0acc14889d5d69ce6a2e221f3e79cd/File/sirezapepazikifebul.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/83902914545.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/jovojotire.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/xumegisasafefa.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/nudukuboz.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/48030938781.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/b20521ef632f1c307056fd418972d0c4/87678731002.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/37f8a66f953cc74de99e15769158dd01/41265817557.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b61d740be53---80345169578.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=what+were+shakespeare%27s+histories+a+tribute+toPDF 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_off00011a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A26 17968 bytes
SHA-256: 150b2e0aa426629e53b33f835dcaf78a5536a3b3f0c29d97c0c1b695a4bd8ca3
font_01_sfnt_off000148a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148A9 10644 bytes
SHA-256: 9f8ffc6e14d6cf817d99e3c7064c6705fd348e7747c870bc57824188b5018414
font_02_sfnt_off00016114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16114 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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