Malicious PDF — malware analysis report

Static analysis result for SHA-256 382269232f417828…

MALICIOUS

PDF

92.7 KB Created: 2021-08-10 06:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 01c28760292b50be1bfd7a3f3a83cedf SHA-1: 5afd4da5ad4eafc0ee35fcd13ccc9b27bc1af679 SHA-256: 382269232f4178282f124a196ad89974f23c80fc1e985cb5b3a1c5ad4d02f16f
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to compromised websites and a visual download button, suggesting it is designed to trick users into downloading further malicious content. The presence of multiple links on disposable hosting and compromised CMS uploads further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/acbd480ea8af663870f6d615fec78389/xepilaverutabojivesexisez.pdf In PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/fbdfec2a5bba273ff47758cce74201a9/14494955055.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/54733036444.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/dimesotofagilesivonogazuf.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/53838518174.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/rawalejoluzokuroxelotufi.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608a823bea665---pejazagenekenadedoguvose.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/1b77b1c1870d1abc2d15a2ea2087bb5a/42230780166.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/zapekebeji.pdfIn PDF document text
    • http://fkhd.cz/data/img/66267258071.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/pezewutiwi.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/l2flch435o0upo8u9kq10c9d1q/wowimadirexo.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdf3a4eb16---dijazikipowonipiz.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/da0a5196806154c11a53c89ac8d99782/kitonakipojabeluvode.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc316e9716e---pomosoxobofu.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/51126651807.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e74ee43ce3---marekebugijenete.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/kebimufagiweneganorunu.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/vilizakojeg.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/711680d51538b766a289562872ece013/57881896448.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/gibabozigigobuz.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16080333ca8f5e---wizukixosepofumo.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c15d9ef105---62797354281.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=number+the+stars+questions+and+answersPDF 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_off00010377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10377 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8E 10916 bytes
SHA-256: f94ecc7db08709794385cb3393136d0288364d9e2107458df35c04da4f859f1f
font_02_sfnt_off00013479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13479 17496 bytes
SHA-256: e9891d52bc13626253b11bb502a630f03bf77ec5b2259fcb5b5ffacd8504f82b

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