Malicious PDF — malware analysis report

Static analysis result for SHA-256 09eef1a49ae5d68b…

MALICIOUS

PDF

89.5 KB Created: 2021-07-06 23:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5cd7d6a5cfacf5b897f0abc1b525c8ea SHA-1: f9e4260f994ba9e53a00619ad2b5acbd6f34b5a3 SHA-256: 09eef1a49ae5d68bd32bd38f63b717d35f889a6c353c83496c80d5e7c606fc50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URI heuristics and the link farm structure suggest an attempt to lure users to malicious content.

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://crewmak.ru/uplcv?utm_term=read+harry+potter+and+the+deathly+hallows+online+free+pdf PDF link annotation
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2cdc806217---supewegin.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/984f678374fd87e566610511f45bcd37/dakegadute.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210624030159.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9f67e419f---92945252498.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/zenixipuzamudukedep.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2ae25b909---60919737734.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/medoxugazu.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f80d1196d6---97100847268.pdfIn PDF document text
    • https://arerp.kr/data/file///wetukapogoruko.pdfIn PDF document text
    • https://arredamentigiacobbe.it/file/xiponafororokoxa.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/69527639114.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724338cf8a1---95749585458.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/0qiuf6boa3s1hrunr5m5tjd1rl/98094124288.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/fimunof.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/d4cd32d6eeaeef5ebe52b1c767c4b002/80386528291.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/20778899361.pdfIn PDF document text
    • http://betamarin.com/images/media/files/78761029274.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/c8ea510df17f5e39ad05e2576c689ce3/xesunijifaxupewokalasijuv.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160758a166088f---xefuruzoganazuwo.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/m9gq4a316qn07jke7jqi29nlfgsqeq38/64626121820.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866da919ab9---19105669377.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/jowokusivoxusidumaf.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_off0000fbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB2 16796 bytes
SHA-256: deb2d2fa524ce6cd793534a3f35d5ee5a1b9514c6c91b4d2f6445a13903ca30a
font_01_sfnt_off00012734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12734 10840 bytes
SHA-256: 28add4b7edec1f9a5c06ab9ac33e8aa0927b94cb0f629146940b357631aa1ba4
font_02_sfnt_off00014033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14033 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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