Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec7802eced3b794…

MALICIOUS

PDF

92.6 KB Created: 2021-07-03 15:37:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bf5cce3c9c832d97e958b7816a573c38 SHA-1: d8eac6ab17fe37825b2c24911ffabe9d29be2614 SHA-256: bec7802eced3b79493676843aafcebe5d75d2cea4a3ba33f94d6e9280ae847d2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including a ML classifier flagging it as malicious and ClamAV detecting it as a phishing trojan. The presence of a 'Clipboard command execution lure' heuristic suggests the document instructs users to copy and paste commands into a shell, a common technique for downloading and executing further payloads. Several URLs are present, some pointing to compromised CMS uploads, which likely serve as download locations for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://drafthe.ru/uplcv?utm_term=activate+office+2016+professional+plus+kms PDF link annotation
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/a282dbu2kkb4d1el90la82f2ir/dalalusozogade.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bf2f0216c---48186123860.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160987662e369a---18545806450.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/e9f678b71f9ecd5f8c8bdc13b823d8c9/renogafominibafimu.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/sagibonukotal.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8cbde13f4---32927979485.pdfIn PDF document text
    • http://mp-journal.com/media/file/dananige.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc40040a16---bosomagegejewubuxuzokefek.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/5jf6bm72hudiiltm3i417vnp14/pesinasipuwirewigesodalun.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/kejewupipukosasawajudav.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704998a8a6c---81010746760.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/70862364635.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/4th43okn45qnfbu9jgiffa9ong/binepisefezagob.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608f926d97125---fufebo.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/485c55711b4445d91b390d38aefbfc6f/zaparagilukexoriwenowote.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/fumujevizuli.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d31963cfc9---60608107773.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/39998543685.pdfIn PDF document text
    • http://capri.lt/userfiles/files/13001876127.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/sibusolusalidas.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/6p1n822drb8cqo4mcqmnb9jan3/23230576261.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/52709966418.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/loziw.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/56jh53dteqto23d9ndsodlppt7/guzusapetejazebetosotivun.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_off0001026e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026E 17676 bytes
SHA-256: d24709a2e790765443d75e9729d4d496f4a21578e1d37aaac553b4cb7b2affd6
font_01_sfnt_off0001304e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1304E 11340 bytes
SHA-256: bb4717f69b3530169b4c5367926d30f309ecfc5ecd6d76f3a3fba2e929e35706
font_02_sfnt_off00014b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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