Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d30cfaa3192143…

MALICIOUS

PDF

94.7 KB Created: 2021-08-29 12:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e57825b483c158a5315b2f5b3bfef521 SHA-1: a613c2f2b9fba548cba7a34e5be70fc5974cea28 SHA-256: 05d30cfaa31921434e7b58256aec84efcad51134a0a518b2e00a8b3cc466c7a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://infrive.ru/uplcv?utm_term=angie+rolling+stones+tab+acoustic PDF link annotation
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/8iorgoqfel1qkunfjbhk7cf48p/12574169944.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/dezadotapajifogobogura.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/61267793070.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc87a0691a---15544515640.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/pawuvojivozimubev.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c5904a61d---6538485074.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1bd55ac29---7532080538.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/34853932737.pdfIn PDF document text
    • http://apmnir.ro/fckfiles/file/60544594315.pdfIn PDF document text
    • http://topstec.com/d/files/suvepewevuv.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/3e2c4723f09591891e97704a613aa630/fibevotuxubejapesarara.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021731016651.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/f28h0e45etvodb4nk4strs4dus/xijelisomi.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/6e1d0cbdc1dfb5ddeb33583f91dc20ad/giwenewebodimakefejer.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/45692347021.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c39d8e56c3b---73866539909.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210616_B4BC10360F061011.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160afd4eec3d63---43921188353.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b821fae2e5c---70520022656.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/zabeba.pdfIn PDF document text
    • https://areicon.com/images/file/30867911705.pdfIn PDF document text
    • http://haworthclassof73.com/clients/73472/File/54998852955.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/betadaviwimexop.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7c3a71c67---nurob.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_off00010a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7F 18748 bytes
SHA-256: 562b2f68383de260d6b706f9ec07bf33947656921360b439a4de1113309e72f1
font_01_sfnt_off00013c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6F 10628 bytes
SHA-256: 005b738761ba5bf82c58ae6a1f7c462730f0cf7713b43e7c0af8f6e655c39ee0
font_02_sfnt_off000154ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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