Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2a8340ebe2f8fb…

MALICIOUS

PDF

77.6 KB Created: 2021-06-28 15:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 297c21f1e9bbd449a715a20d6e1e5a06 SHA-1: 9dbeb881ab70e5df7ef0bf57a5b6765a58e46083 SHA-256: 6b2a8340ebe2f8fb69cd9da41b2954194dd85a29b6dd4a31ea5a24b05b42fbc6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs pointing to compromised websites and potentially malicious content. The presence of these links suggests an intent to redirect users to phishing sites or download further malware, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=1st+standard+tamil+book+in+2000+pdf+download PDF link annotation
    • http://artospace.com/pics/file/timukavokukob.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d2c4e86d6e3---rogebo.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16095d2ee3f45b---33974089293.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/ae8f2cd35d5c3161a762df402a3f9c85/20262859063.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b918540bab5---46186644969.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096751fe18b0---pasawurerevipoxexeju.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/3cf8fea28611c87c79b60aa5d7bbc6df/12493762455.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/jokadev.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/vivan.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/masonitutotusaxalelinib.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f2017df0d4c75d6f73974d20e59dbd83/76421528101.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923fec1f674---tofasexalawefiwowodagot.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/9prfsct8icv51n2rm1lon1no0s/76782767290.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/0666d8eb40388e8216e4b17662aac289/worebig.pdfIn PDF document text
    • http://aven.su/userfiles/file/60097690097.pdfIn PDF document text
    • https://nevisnews.com/userfiles/6123375519.pdfIn PDF document text
    • https://assistenza-termica.it/file/23180075001.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/4355360616.pdfIn PDF document text
    • http://simonide.org/userfiles/file/85624767033.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/19395972623.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/vonizozimexapisasigewo.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160795b12bce5b---17613660251.pdfIn PDF document text
    • https://aitalk.vn/upload/files/giraf.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cafe653872---pojibitewi.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_off0000cbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF9 11044 bytes
SHA-256: 2ab81a5610b5e55dfbbc8946657c0558d0bb534dc7cf1adbffefde765259fd01
font_01_sfnt_off0000e57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57B 16692 bytes
SHA-256: 08cdc2d6ed44210e65bc4756d41da5dc75d51d84b0237380e61f434ff811db5e
font_02_sfnt_off000110dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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