Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ce37c26438adad…

MALICIOUS

PDF

80.9 KB Created: 2021-09-04 14:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0d6a7cee567ba724c17e662b6e754865 SHA-1: 0912213e8390562fab5ecf40b69fca1524888e95 SHA-256: 32ce37c26438adadcd2b23ea517062f9c360f4e1074edc97bdbc0c475c03a66a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of numerous links, including one with a 'utm_term' parameter, suggests an attempt to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://pixomot.ru/uplcv?utm_term=sp3+hybridization+examples+pdf PDF link annotation
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a610ddbf1c3---tiwolidozopagalelugote.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/89771154362.pdfIn PDF document text
    • https://planningpvedh.nl/ckfinder/userfiles/files/magifakabitaxipifagalenu.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/kodibugenosixaxewakopime.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/fiviwuvilozal.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079471c12a5d---riruwo.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/38312b36afb3917788295c96417c1f87/fikoxusevaximemosuzuniz.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/32581949982.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/kunidukukususag.pdfIn PDF document text
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/lnh0t4g7jladiejd5106l5u6ds/12373644522.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1d86eb3de---9784213745.pdfIn PDF document text
    • http://nuk-amro.de/userfiles/file/69340088831.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/7ce13dc0ce0e4d14861702e105b6376a/sexigibafis.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160846f8d16f05---xebekonanetuvu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bba2c27a6a---moginuvusino.pdfIn PDF document text
    • https://educhina.mn/editor/files/vogonolanojufejewatefo.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/29c693426f494484e0b0b1f4929c3208/30220683673.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/paluziwer.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/napumo.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/jivavawigo.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6455773e3d---sipiti.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/67370622946.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/31643462009.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210813031555625901k12b1p.pdfIn PDF document text
    • 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_off0000d6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF03 16964 bytes
SHA-256: 137d2feef05c10cbfd9e5f9f760b5d4da52595bbd3677275c81191bcc2ff7a2e
font_02_sfnt_off00011b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B96 11428 bytes
SHA-256: 0439ed4bf3948ec4f9e4363dcc7db974fa35976cd37dcd1c6a6ff1a136cc7296

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