Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e17f010020bb2d8…

MALICIOUS

PDF

85.7 KB Created: 2021-09-01 09:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0b59d0536e95a29863f2a1cb0e9b22c3 SHA-1: 388408f105ecb40bf0bf72f760840de9be672b68 SHA-256: 7e17f010020bb2d82924274b77a6aa3f3887c4b989b574c9b5c60aaa11b3ee32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple external URIs and link farm heuristics strongly suggests a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://happysmilecard.com/uploads/files/24129339352.pdf In PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/d6c0e0bbbbd0668c744e36dd15977cf8/kojotixemedem.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/blts5t68cvg7l6bj82lcqve6o4/20986132540.pdfIn PDF document text
    • https://mobilityservices.it/file/kikagerazemefunojof.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/sizefizubu.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf3bba0107---38696359373.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/fowoxog.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56fbee85d5---vufulatikak.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/a8cc5c794aeba7ecc236ebcecca0662c/77481306099.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/68228088611.pdfIn PDF document text
    • https://botroul.be/uploads/35457028522.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/suzuvajaterezamawumel.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160739aef6d1c7---20262804859.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/21157069747.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/889b12fad65e131000964cf23c00f3da/bepog.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/55713606942.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/48678555882.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/15c39c21890a3e6a29c68c7281ca2d27/pexuforiraseludi.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/2255610572.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16093769fefe33---97191526984.pdfIn PDF document text
    • http://dongkoo.com/uploads/editor/files/jumeruzebunojisaxugofo.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d08072823---vilasuletekiguxemefixexe.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/pamapifatema.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/f50992d397ec5337b0d32b083da027a3/3182055581.pdfIn PDF document text
    • http://czyxchem.com/upload/files/pajufigipuxur.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/senulopufilewelekona.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/lowuxunimosunatelexinemu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=would+is+a+modal+verbPDF 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_off0000e79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79A 10504 bytes
SHA-256: 5b55945542949afd4b489740d44a57372914add217ac4868d2d511a6da160c03
font_01_sfnt_off0000ff81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11793 18424 bytes
SHA-256: 4804c963dd9b26b5bad2f5357340a0741edc81e0f01e4407eaf45dc4db5b4806

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