Malicious PDF — malware analysis report

Static analysis result for SHA-256 674732aed57094d7…

MALICIOUS

PDF

83.0 KB Created: 2021-09-06 13:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bd932888857b686f581698604d43f063 SHA-1: ab34d00c332a615bd938f36d1cafe94a9e219758 SHA-256: 674732aed57094d7a1231e0b43966bafa8151fe72f5c1d18225e62ce07361680
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of external URIs and link farm heuristics supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://xtrafitcoaching.com/www/images/files/12274901459.pdf In PDF document text
    • http://vattucongtrinh.com/userfiles/file/liwaginesexetubam.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/berepejudulazifeminexop.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/morixanusaf.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/gukaludogazofufeg.pdfIn PDF document text
    • http://crystalcleanwindowsmn.com/clients/c/cc/cc5f591ab25ef7bbd7a205b431f39e57/File/rikotu.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077e4938a99b---wafuberovijiw.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efdd853b0e4---xuxerusutiwawezapaf.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/mudigarodewuzasemavewu.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24b472f4ea---niwopovede.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/23743826925.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/67024566713.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/9d31d788c17d77642883a7022e2ff9c8/6058729346.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021071303484846.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/40732208318.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/32264301954.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081729719f1b---93945625916.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f266814a31---92422984718.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/rosipisesosofena.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160856d843b0fb---xakeragudidumulagodeve.pdfIn PDF document text
    • http://ruihuitax.com/files/file/2919410244.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d08441f206---675339629.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=license+disc+renewal+form+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_off0000e1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F5 16860 bytes
SHA-256: 940079f143439adeeca666f055e3030c45d53d42baef5a803b41e3a04c242130
font_01_sfnt_off00010d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D81 10724 bytes
SHA-256: 923dbf7b2fb4b38e56e53a54768a1492d8202a4134d69eafab22920df887e293
font_02_sfnt_off00012627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12627 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.