Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cda2fe94ff22069…

MALICIOUS

PDF

83.7 KB Created: 2021-09-18 21:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ab0c1d06ab3db8a6898c4d373885035e SHA-1: e52a8b8acb707b201bfb8d5310203fb3bc12c668 SHA-256: 2cda2fe94ff220696f0f0c4161604c7d6e0835bfd4cd9503ff9708e1cd5035b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://garglob.ru/uplcv?utm_term=cara+download+alight+motion+pro PDF link annotation
    • http://s-privod.ru/userfiles/file/lasure.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/68447976406.pdfIn PDF document text
    • http://clingac.es/d/files/31652891440.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/51229197947.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/87067920499.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/12413531470.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136eb68be163---wefojidur.pdfIn PDF document text
    • https://kenhquangcao.vn/uploads/files/zofolasivoxolukivil.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/nepegozupon.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/91885036083.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16145815d7585d---kezisumazudofurutedajusi.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/83935373908.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/59512303004.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161450453b18a0---xanusenawaladiduxasufore.pdfIn PDF document text
    • https://promise-land.com/upload/file/koxilolenilupepuzader.pdfIn PDF document text
    • http://elitacasa.it/images/file/12229060221.pdfIn PDF document text
    • https://chungcungoaigiao.vnpec.xyz/uploads/files/lomedu.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/18368949671.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/10841572324.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090712194873499.pdfIn PDF document text
    • https://birudongker.com/contents/files/90918103891.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d27590cf20---35796935559.pdfIn PDF document text
    • http://ewtch.com/upload/files/66458127971.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/mimavajinawexazetuxezona.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/pufafixerirodidituvuni.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/vibifozaxegukogulimokeji.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_off0000e1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BD 10656 bytes
SHA-256: 3b903256c0acb072e4c95bf3d5fef80fbbc354df9fff39ce429506072fe29a60
font_01_sfnt_off0000f9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B2 18204 bytes
SHA-256: 46df4576f2eb11cffa4a7dd630c28a478a4acdbe98d4935a90779b106b920017
font_02_sfnt_off00012932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12932 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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