Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d5e6e7b047bf57…

MALICIOUS

PDF

85.7 KB Created: 2021-09-01 08:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5c34143e2f2f4230809bab61c466513a SHA-1: 15b2831af134e47706be65a9db4220c3de5be77e SHA-256: 68d5e6e7b047bf572722d0da5cecf8c8556d6535b72749f14eb803707d68fa46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress installations and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the structure and URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://allytemp.ru/uplcv?utm_term=famous+japanese+people PDF link annotation
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/rv988vues6c3r995kkpa4ruo62/25285544457.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724bddb1c66---16896870199.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/abf9347eb450526566e73f98dad8390c/nabekokujazoseguxi.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/36801000550.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/jefevurebazekusato.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/15310005592.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/zimufure.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a0c1f8f2a1250b100882e8d750f9a7ed/9052551717.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/8i9f1hleq7od971jafci0r2iv7/rejotuzokigezopufoxa.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/14533404873.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/finokoluvivemolenuxaxot.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/spb72512r5m4upr1vtov5ig51g/betesakelofugaj.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/tukenixekulujipiteroxule.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be2935742e2---24504591083.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4aafc9788---wunawimisafukikasijunotu.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/wasiv.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/18046727662.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cf0d7ad6840f8088da7a18818814726b/xopavim.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210607_08437900DE37ED6C.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/afd50cc2e34feba63fa64f0e9605ad59/88476687322.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160982a124320b---nevarulexafo.pdfIn PDF document text
    • http://ndt-ultratech.com/files/89429262955.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/1c90c6aa03847995c497d5a3ef02fb10/29046356872.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_off0000e868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE868 10328 bytes
SHA-256: 8217bcddca7010c21fab4b0cf78f2d0e9472f27d90fe5c6773a01812d12f1c45
font_01_sfnt_off0000ffb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB1 19060 bytes
SHA-256: 97a64c5ca1a6a5cc6b9581ab338d0c1af1a1bd4d71849481957b8d246a45cc77
font_02_sfnt_off00013197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13197 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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