Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd329186fc8e66a…

MALICIOUS

PDF

76.9 KB Created: 2021-09-20 07:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9f737b46dd4c446bdb9dc8c6b4862d75 SHA-1: e9fb947c58275763994ab56b681e60b041c66080 SHA-256: 2dd329186fc8e66ae4ce77fadc93cc59d1610ac8c863b9bb3d272c9ed8446938
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://allytemp.ru/uplcv?utm_term=dazn+apk+cracked PDF link annotation
    • http://www.solarwindependence.com/ckfinder/userfiles/files/tutixisanolipoburek.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/mifodoximal.pdfIn PDF document text
    • https://akvaguru.hu/user/file/36060990368.pdfIn PDF document text
    • http://hardiebase.com/uploads/assets/filefile/jumuzus.pdfIn PDF document text
    • http://citra.cl/userfiles/file/satoxapeditedug.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/sorojewa.pdfIn PDF document text
    • http://tradingcall.in/ckfinder/userfiles/files/92144698317.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/75672422585.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/55e73lvggt8uvmbb1u6i7qsi50/suzemujodubireja.pdfIn PDF document text
    • https://loyd.rs/images/file/35980702525.pdfIn PDF document text
    • http://xn--12cxa2boh7cd6g7anex5omh.com/ckfinder/images/files/kizimikaxokavunelol.pdfIn PDF document text
    • http://santeh.md/img/files/zakikurajepobujamum.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/16790244246.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421a38535f2---52605908886.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/zosakatasagogamixi.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/9490713977.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16131e26f1707f---luwilosolosilakop.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/161406a6cc6952---sotozimawuzamorazudofej.pdfIn PDF document text
    • https://turkeyinsurance.info/images/file/vopelekuvudupap.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/44173579020.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/nogudekenifufosewar.pdfIn PDF document text
    • http://kfbma.org/files/fck/file/patufozage.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/mezujif.pdfIn PDF document text
    • http://ghefootmassage.com/fckeditor_userfiles/file/51734341881.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a7c2a899b---58933187771.pdfIn PDF document text
    • http://www.southpointinstitutehowrah.com/admin/uploads/file/gosajinanuxag.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_off0000cc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC02 10136 bytes
SHA-256: b076ad8f3ba8e672cbd450e1acf0822c172e04f0b97942c2032b0f1555807547
font_01_sfnt_off0000e2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C9 16924 bytes
SHA-256: a9fa6350aad0256a1543c1d545fe95731f20b2a3ea7e8f29da9138a3a37923fa
font_02_sfnt_off00010e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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