Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde1ed6d940b7297…

MALICIOUS

PDF

78.7 KB Created: 2021-09-19 23:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f2c8372a7bfca6d21a72e11682336e0c SHA-1: 94bed75acaccfc5838aca0834310a6805a25c09b SHA-256: bde1ed6d940b729704dd7e1d5482ee940b7803705484ef55db1ef09b1425db69
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links, many of which point to disposable hosting or compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or serving a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://consoles-a-gagner.com/fckeditor/userfiles/file/pawolafopojovave.pdf In PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16141a7ce1bbb5---wuxomudokikofusogir.pdfIn PDF document text
    • http://cpviettin.com/upload/files/zeriradates.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/tanaveduxidodatuzi.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/sagub.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16139db1445b09---42968411222.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/patupovezugesufejexadugas.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161376d3e6afe3---vitunetavumapiko.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/dozafugujaraze.pdfIn PDF document text
    • http://snft.ro/media/file/wisefakivewuxaxowipimawow.pdfIn PDF document text
    • http://videocycling.info/files/file/jerubemijo.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/kafodilonizadojuvak.pdfIn PDF document text
    • http://huonglonghotel.com/uploads/image/files/dururonutetikogaxejadutu.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/zisotatatisovupezisub.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16136676761f7a---lumimu.pdfIn PDF document text
    • https://teamcode.net/upload/files/takaxixojimel.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/nakugumuxi.pdfIn PDF document text
    • http://1carl.com/userfiles/file/68128032024.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/dozimejefukiv.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/83480054586.pdfIn PDF document text
    • http://4darchitecture.org/img/all/nalijase.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/68012647771.pdfIn PDF document text
    • https://coop-alternatives.fr/images/images/logivuwutafan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=block+craft+3d+unblockedPDF 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_off0000cfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE3 10764 bytes
SHA-256: bacc69a8f2f35cf6b4e7c7b1840295085952fd177686afeb469de9cfbb430a48
font_01_sfnt_off0000e8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E2 16972 bytes
SHA-256: 7fde22029aed810f3e772b3e822eceb3e352dfee58d527b04ac5cf0a22cf83bd
font_02_sfnt_off000114e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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