Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b228f9004e56d1…

MALICIOUS

PDF

84.6 KB Created: 2021-09-07 15:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e73dde367b31be94c0418a32c54f9994 SHA-1: a3721e0d095c19834290091ec573a8aed0bb3cfc SHA-256: 07b228f9004e56d1af5f46c6cd8f7a797ce17a6f1b7f6cb49045ba261400f38d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads and are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608af07c89fb3---vodabilegapelel.pdf In PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/rk1q5kncb5pv1mhujo5a0esaps/pirasawidulilak.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lovavodelijubepuzaginim.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608313691a73d---xefezipoguki.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/f7ae6qg7e6ppmm2fv3vjp06vov/wunisi.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/89989930419.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d42f484bce---20308563653.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/288bb19fb377dfc3fd7b996d71e9b047/ziwuxiketesurebunuf.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/67150410637.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/demoroperixolurizuraguruz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2857566531---bidawagedumuk.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210903_9AD70AE9CF8D8795.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a538bd3961---sasiluvosoduvijitasix.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/6634600280.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/wolenunivagivizemol.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/6743975447.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8d232ce8b---binupiwimevesaludonuxut.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/95985446779.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/mtpiklrgp003qr2psneumq4hgb/wejofifozexeveb.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/xeredubarixuwarurixekaf.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc22cc0bb4c---48100584438.pdfIn PDF document text
    • https://ashasuchikala.com/ckfinder/userfiles/files/70664528031.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/65649972798.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085768c176b6---66646436329.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=cobit+5+foundation+exam+dumps+pdfPDF 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_off0000e52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52F 17552 bytes
SHA-256: 460f9d77ca77d2801ea97c7652851e928b94f8d959a41d615ba03c2eb74c9876
font_01_sfnt_off000112e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E3 11020 bytes
SHA-256: 62ca725054d87ef74379e661be97d67c5852d53fada95ef0c196cfd310a6be29
font_02_sfnt_off00012c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1