Malicious PDF — malware analysis report

Static analysis result for SHA-256 be35dd4907830c70…

MALICIOUS

PDF

86.5 KB Created: 2021-09-14 01:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 48e9f9da387eb8e639339bd2d64e6faa SHA-1: 306a262d25074bc728f5ebac504c5963ab58c15e SHA-256: be35dd4907830c70abd2ffddf88ea0ae9a6f1eec22476752b93c6538ad5b0755
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body is heavily obfuscated, but the presence of numerous embedded URLs and a 'SE_CALLBACK_LURE' heuristic strongly suggest a phishing attempt. The primary goal appears to be tricking the user into a callback scenario, likely to extract sensitive information or credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://medvor.ru/uplcv?utm_term=mega+base+ideas PDF link annotation
    • https://soenen-pneus.com/upload/file/22355345040.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/xegobuxeguwulawitopexuko.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/47050925018.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161383dcede9b1---7952690963.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/49321613160.pdfIn PDF document text
    • https://phuquiland.com/upload/files/nufurafifivevokejit.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/jurusogimufebedoxo.pdfIn PDF document text
    • https://curtain.jinware.com/upload/files/16452727651.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161375186e5d9d---66399783381.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/farokon.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/20645784773.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/472f0f3ccda55d4891747453eecc48f7/60252513614.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/detawosi.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/2912776247e1553e48ce09eff15b3038/jusuxamajukugezusixego.pdfIn PDF document text
    • https://togeltop.net/contents/files/50211159339.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/12592395276.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/bewixamutibudikanik.pdfIn PDF document text
    • http://surestegc.org/documentos/file/gobubolemilitokivojakupow.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210903103644_1012466355.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/v81hlvi05rursnej7hinloof9j/13789653211.pdfIn PDF document text
    • http://markone-tools.com/upload/files/tixevi.pdfIn PDF document text
    • http://tes-sys.com/uploads/ckfinder/files/20210913/16314850367581.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_off0000ec83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001049a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049A 10088 bytes
SHA-256: 9e2555e063f02a1c7a8d7ce22cd03a89d68f5924481eb05da817f44fa766f1ca
font_02_sfnt_off00011af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF7 19460 bytes
SHA-256: b7455da83aef44e95911a0c782de810d5fa4c8cacb83a99524f2c9aaf3e7b92c

Open this report in the interactive analyzer, or submit your own file for analysis.