Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb01fa1d39c629f1…

MALICIOUS

PDF

100.5 KB Created: 2021-10-12 01:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 92b2cc68dce0beffb3241420d7f18595 SHA-1: be051ac6c684e809fec2d1228f4f7f11b6957a15 SHA-256: bb01fa1d39c629f194711bce75fa3e68afe423788f18481244ff9edd8bda54f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains a link farm pointing to numerous external URLs, many hosted on compromised or disposable domains, which is a common tactic for phishing or distributing further malware. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://pansky.ru/UserFiles/File/60801000080.pdf In PDF document text
    • https://arabadvertise.com/userfiles/files/45241555822.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/90943473534.pdfIn PDF document text
    • http://alptw.com/images/files/dedumigazo.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/rakakeberelus.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/161473226bb2ad---64686037472.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/6377061411.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/2bfe3d4212795681c7949b36e288ca9b/25302209768.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/58141314803.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/4d1633e1c7af9d272675526a89b2b2a8/rodavelaviwufez.pdfIn PDF document text
    • http://na3.it/misc/file/sesuwafa.pdfIn PDF document text
    • http://rafaelokazakov.com/file/ronedeselasum.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/83390760672.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/sanetilogurol.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/fr8p9qc6qdogn5jlcqpnhjbrls/871176336.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161416ca68237d---favomo.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/xifojerajazaligovukero.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161447a8b1af2a.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/jugotofi.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/jugujagifut.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/xabitesu.pdfIn PDF document text
    • http://ndt-ultratech.com/files/26040853667.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/nozawitewijitatod.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/71303714011.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/93585441266.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/7xhmvLXWVJc/uplcv?utm_term=meaning+of+intend+in+punjabiPDF 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_off000115c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C7 23360 bytes
SHA-256: ec749a336f7ef55cef54fe614e86f6742c275872fe93ead6e82918f089a10425
font_01_sfnt_off000151f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A0D 10724 bytes
SHA-256: 9a38cdd737cf40b50225406955d0b0898b0859e6a9dae0d9bfec7ecc5cfcc2d7