Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f711e139f49ae22…

MALICIOUS

PDF

79.4 KB Created: 2021-09-05 18:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4084b39aaff20ebc049e7200ad59d44e SHA-1: 6be4f4ca89672a4513afc2ebc667d3c5fcf020a1 SHA-256: 7f711e139f49ae22d18ab8f23ba63a9a47303a690c70983ba82530899b0c20bf
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of external URIs and compromised CMS upload links reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://hamyarsanatco.com/ckfinder/userfiles/files/83936658428.pdf In PDF document text
    • http://hkalc.com/userfiles/96315834136.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16108321ac6d65---36815471784.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/qk0uu61j3oqbv7c5a2of7fhl73/bovanitigopexumu.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/e212fafe1c742ef255d994960cda4dd0/binekejeso.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/xodapogerusimowetajoro.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883aca3b30d---togazesusazibazesejak.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160954565d676a---vutififadojezufuxewul.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/dvt37fnuhbas1o1gv34e93kv6n/36896900539.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/tibujenetuxiso.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/229c5fde14270592c6963e0574c448ab/wumuxovemawiva.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/84079449091.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/gexakoranazidiza.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/jusarezatido.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/26228556704.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/diraxera.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/dupewa.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/tuxadinajegu.pdfIn PDF document text
    • http://heatherjansch.com/ckfinder/userfiles/files/tefamojogaruvoroxogipo.pdfIn PDF document text
    • http://bakoca.hu/files/file/vepixe.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/dalagufefogowexudu.pdfIn PDF document text
    • https://penal-garazh.ru/files/31268669330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=tissot+watch+instruction+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD492 10512 bytes
SHA-256: 5b21f5ac43f7dbf98cf3eb195bf98c6fad2da41b006a065d2a72bf6d05201c27
font_01_sfnt_off0000ec62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC62 17136 bytes
SHA-256: fdf29f1235fcfe580002aa10ed4165d82de88d74b1e74ee4050ca1b0a995dfb0
font_02_sfnt_off0001182f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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