Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b0db5c72737837…

MALICIOUS

PDF

87.1 KB Created: 2021-07-20 19:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 4e40f7bf872f8cca473acbac3c6a01cf SHA-1: a3b92c4183900440651e8dce944d2978cba7862c SHA-256: 09b0db5c7273783746913d4e62e832fd5dc42b0d8217d099b8b98a4adb161b07
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous embedded URLs pointing to compromised websites, likely intended to lure users into downloading further malware or engaging in phishing activities. The presence of multiple URLs hosted on compromised CMS platforms suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c71c75b294e---xadegek.pdf In PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae5095940a---derunugemorun.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1606e75de70e8b---legawikapuxuliduramumisu.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/77661452342.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086588ef17ea---96278307926.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aad42bd1a14---wapekelaw.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/42044b927ae3b551a6e7a5d72bcac3e9/nibipeziragomokutorut.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608a60f3dcd38---96483641442.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/muzifubebidan.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/842a6e687ba28f9e8fc90fee614bb34d/13796879826.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608f593ca6ac6---waxegipato.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/idfqjf5ih7a0jfsbecglt3k36g/52327576696.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/e99cf3e4763cd482e41270573c9eb88b/jobumuzofivuburad.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/getidamafap.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/2b95d374eee5ebb7ee79495ad5dbe9a7/bujewetelifaboladunesi.pdfIn PDF document text
    • http://michianaorchidsociety.org/clients/2/28/2832e32407c795c8d28ffe68102aa18e/File/655054931.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210516204441584.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/76102093181.pdfIn PDF document text
    • https://hijaustabilo.com/contents//files/28497580043.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/qotr6ttij3odcbaiv23pf5v6fu/wufaneduwufapedudafobuj.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/39157385479.pdfIn PDF document text
    • http://allycatering.com/userfiles/26911267966.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=define+pidgin+and+creolePDF link annotation
    • 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_off0000ee11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE11 10528 bytes
SHA-256: 0952b1b6210dad84c953638741f2f76c0fc37c2bdc20d07805d1df9402852acd
font_01_sfnt_off000105e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF2 19344 bytes
SHA-256: 2e79c84426a3be98a976ea60fa240aee3ff6c230b3e9af697c0d07c8ad7742dd

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