Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e6b1501f9023fa…

MALICIOUS

PDF

88.3 KB Created: 2021-09-05 09:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e4ea1d3629e6067b1f0be79370e58df9 SHA-1: a728568283fe240513f58fae10c42533494d3fa1 SHA-256: 08e6b1501f9023fad7a2b6d91c9dd9cefb5db5c04a3432e7ccbaae7d23c638a7
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or use UTM parameters, indicating a link farm designed to lure users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. The document body is unreadable binary data, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=auriculoterapia+emocional+pdf PDF link annotation
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/29586454cfaecc8f97fd0434c1bcb456/59290852575.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/60520119064.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/filevisukutebosasetavat.pdfIn PDF document text
    • https://zzwgjx.com/d/files/larebiwegudugivolivek.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/xoxoxufatexulux.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/eage9gemc84akt1tnlq7k84qj7/mexadinomuwuwajo.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/tumifav.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/15377935923.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/zowunaxowogopipox.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102596aa1f2b---45526989676.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210903_0DABFC0FE234B4A4.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbf3a6cfdb---73458156311.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/2172686ba85e9100a28ebaf546321808/94914169440.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/tujejixujinudizulit.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/81917597956.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bd2ae0a9b---61250361437.pdfIn PDF document text
    • https://tiemhoamo.com/data/dulieu/files/73159074850.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/8c503eb68f2d66ef3da48e087f4a8c01/terinaxeguguwatularilu.pdfIn PDF document text
    • http://phuongninhphat.com/uploads/userfiles/file/81718548452.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/05fc81dafc94c7238214c7e5017ee862/nitubir.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/45945942533.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/labaxowajegobiw.pdfIn PDF document text
    • http://www.77ice.com/upload/files/temadajukaxafirofiborujud.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/b0c453107fa9bc70b10f9d1c28dc65a2/barabagazosigujopikijibuv.pdfIn PDF document text
    • 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_off0000f1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 18788 bytes
SHA-256: b11115289797fb988cee2fc131451b6597cb6476541ee6314fa3e4a259c4a9f6
font_01_sfnt_off000122d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D7 10692 bytes
SHA-256: 8afa83ee2b3fefd269157f02efbfed7ac62feb188feb9532e2d45dd4bd751020
font_02_sfnt_off00013b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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