Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d07be7a22b55689…

MALICIOUS

PDF

83.4 KB Created: 2021-09-08 02:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c36b8f6a514378280dc686f4987f244d SHA-1: b1992a1f2b1523f4440cffde95a4f354eaf940a3 SHA-256: 1d07be7a22b55689e58e274df31a471f4e6c369d3becfd5dec7b6feb159bec73
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URLs, many pointing to compromised CMS uploads and link farms, strongly suggests a phishing or malware distribution attempt. The document body is heavily obfuscated, but the overall pattern indicates a lure to download malicious content.

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://queure.ru/uplcv?utm_term=download+commercial+invoice+fedex+express+pdf PDF link annotation
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/8abae20fe423ee0afcedd2b4743409c8/24694989807.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c70a4ceefb3---96612823922.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/93022c19402d29466fd11c0d78cb267c/56572553276.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ab7d27ac76b---fojadozikizek.pdfIn PDF document text
    • https://lemanssrl.it/file/xedulerajakezameredufikib.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/372fbbdae9d5f6eff934a5ce87a1a0fb/bedetuzapagukizedokikaz.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/gupivopefa.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed6c937835---43292594512.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/57388326512.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9cfea3576---kawituruk.pdfIn PDF document text
    • https://ikima.fr/uploads/file/jebuvisit.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/fazerixag.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/r0sgase64ee917m5e7t5f9gcf4/nuzepobovukero.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160806a8c6c5ef---59079627698.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/f552dad3cd9d028515ca601f391b05a9/semimusu.pdfIn PDF document text
    • https://airbays.com/userfiles/file/18084253556.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/18621852464.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/zavumepexedulabazinasu.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5acd76fc35---94854677670.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/7dc0d5e49e8e268c78c091791b814dcb/59424704235.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984c24e601c---mokadurenibo.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/38193852767.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/a7f9ce2ee3861418e5d11f9be00357ed/bomowese.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/2f0d65423806ece2b40c83368b6455be/gimozinaxomaxiver.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_off0000dfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C1 10936 bytes
SHA-256: 938fadf35c2365b848942891e70f3f2b74574ea7af2e9bf37d3837634c196ca2
font_02_sfnt_off0001111d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111D 18180 bytes
SHA-256: 3a9ed026cae7c1d6c6f8e3b383aa2768fe39a4cd7378d18fa82ac41ecc657172

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