Malicious PDF — malware analysis report

Static analysis result for SHA-256 9302cae2f194638f…

MALICIOUS

PDF

80.4 KB Created: 2021-09-08 15:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6ba0bd7c934d5e4c45af62014d6bb400 SHA-1: b4f56315a6b9d39a2a2da30cb23543acd3391654 SHA-256: 9302cae2f194638f4266034fdd64a5a6d936f1cec8e92468ff144b61191b9a50
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 a machine learning classifier and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive users and potentially compromise their systems.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.willmarshelter.com/ckfinder/userfiles/files/duwavunijamodanujiruguw.pdf In PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/c8938d2b7091daa7e27bf617b2b5a7b0/texuxiforalok.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/93862031047.pdfIn PDF document text
    • http://webminmax.com/userfiles/file/rudafikulibad.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff4f3a1574---61003033597.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/23605846734.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/nuwojekuvaziju.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16131dce330466---zatorazigokorepovajamuvo.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/kajojibiwudofaroxemomexu.pdfIn PDF document text
    • http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/xatapukuwakijinuvo.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/64714826559.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/58409924317.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/367477947268c2e23441fb13af6e382d/21660060496.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/tejikafobijo.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130bc0ac06e8---bijezebunizipizelesidux.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ir2mncojh3549bm9esmactub9h/39060703666.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/19624537877.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/86136481076.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/1539005767.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/79f3636f2af3424e09cfa90d1c513c63/xofurib.pdfIn PDF document text
    • http://gcoekmr.org/cukashmir/User_Files/imagefile/17137070368.pdfIn PDF document text
    • http://autoachtercamper.nl/userfiles/file/3925380916.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/h9c9vt7ps0r3b82n54qt45vfe9/46693130111.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=harsh+mohan+pathology+8th+edition+pdfPDF 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_off0000d558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD558 11260 bytes
SHA-256: c5ff56af3ba6d119ae2659712c3bead0d45f469f5806d5ccc1f3ba5e57cb57e5
font_01_sfnt_off0000ef57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF57 17096 bytes
SHA-256: 7d2e1ed64c95dfd697f1b6109bab8eb74d263cc437046eeb7478de600927d0fd
font_02_sfnt_off00011b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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