Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb302f79b6d01e5a…

MALICIOUS

PDF

108.7 KB Created: 2021-09-05 17:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 25da6c264a9ef8b93d9f99aa63c386a8 SHA-1: de91ae5411f04752579d4c13e2f35ae1b4730b24 SHA-256: bb302f79b6d01e5a84f84f18b1b6f38c700d08227d711b24ba6f622430562726
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 WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160f1d760e261a---lirezepivu.pdf In PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/5bb0487c3a0026068d35c52fffbf17a8/zajolepipimigepar.pdfIn PDF document text
    • http://samsungklimamodelleri.com/upload/ckfinder/files/najupafovobofo.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cf02e704f---38607432318.pdfIn PDF document text
    • http://ping-property.com/user_img/files/tazefaxoxobogixomariz.pdfIn PDF document text
    • https://cebrigantina.com/025-CEB/images-editor/file/13484733740.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/63394697015.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/fatemuvaxu.pdfIn PDF document text
    • https://kurtwohndesign.ch/userfiles/files/80249740673.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/13877842388.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071e40cf3383---nefupokizutodabiwofube.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/86853414748.pdfIn PDF document text
    • http://szwygs.com/upload/45415602973.pdfIn PDF document text
    • https://cubic.is/userfiles/file/pesikepitowoxoxirom.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/geronemixodumilelisinim.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/aq6msq0jcn8r33l2tooiv44jt5/gikinuluvogebaxoloramibo.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/39806612297.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/semukisepozap.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/37739493571.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/pitasusakabijujenetukaj.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/furobadanasopik.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/595960912c0587c55b3f3169490f60dc/3058996755.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=manual+de+programacion+codesys+v3+5PDF 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_off00013a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A53 20892 bytes
SHA-256: 1550caac45eda67c250add135e0c0906a4ddcd7c6ac3811b896d7b904b86ec1a
font_01_sfnt_off000170ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170FF 11336 bytes
SHA-256: 6a873558811dfef51b612805b3a4c14d31d35e32d50e5f54fb93d9024eb3b553
font_02_sfnt_off00018b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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