Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab50e01223bc483…

MALICIOUS

PDF

82.8 KB Created: 2021-09-17 08:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fd2f0c0d0e0c6ec989d318b61eece584 SHA-1: cee85e155abed0c570e3ef68e9a79a35ac3d156b SHA-256: fab50e01223bc4834e6b297ede6b928f8f142c9ed84300d4525f2697dc221a7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest a phishing or trojan payload delivery. No scripts were extracted, but the sheer volume of outbound links and the nature of the hosting suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cructi.ru/uplcv?utm_term=fc+live+cricket+app PDF link annotation
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/wojakagesawitexal.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/viduxufifewazixi.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/vatavunusetodege.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/59177888159.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402c593837a---kukujaginovotikitapofud.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613eef3a3d61c---pojuwukivuza.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4569d6d4e---12434633410.pdfIn PDF document text
    • http://japan-railpass.info/images/blog/file/38995708247.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/vivamulofizeko.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/nezelejidajaguwow.pdfIn PDF document text
    • https://cardolf.ro/files/wetuje.pdfIn PDF document text
    • https://kermanrooz.com/img/files/jegetevafoberuxil.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/jizisu.pdfIn PDF document text
    • http://tai-group.com/upload/files/88258862463.pdfIn PDF document text
    • http://saydersan.com/firma/files/tuvajokiranuxidim.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/58522230714.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/62041871206.pdfIn PDF document text
    • https://pqclass.kr/imgs/file/midaxunopepugobixuxasowom.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68995039224.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/17219982963.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/25655605485.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/34987772127.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/dikusobo.pdfIn PDF document text
    • http://dlugopis.kbo.pl/ckfinder/userfiles/files/95710987765.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_off0000e28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9C 17320 bytes
SHA-256: d43479ba658bc413978491b642deb72db79d596632a22ad4eb5a16e697caca08
font_02_sfnt_off000126e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E8 10108 bytes
SHA-256: abc4793cace629fe30a0bfb7c37e071fa553c35be3d6390494ec2d511ec09c6f

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