Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e75156b8d214664…

MALICIOUS

PDF

85.4 KB Created: 2021-09-05 07:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e0d32fc274191311bea22a2985df4cf0 SHA-1: 8e7e6c23aa04b34901a48e06dcbf1059ead260b3 SHA-256: 0e75156b8d2146641c021e5216e889e784aea9fa7bc9323e847173de07cb7c51
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lecapsuledigian.it/file/nobejesigofeneloxeba.pdf In PDF document text
    • http://msamericapageant.com/clients/873634/File/loweku.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/28280271871.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16096cb61a96fe---45243254084.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/34482465080.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072164eabf8b---wopurijosexanarilomogoroj.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/9556102462.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16091b78488258---87034698580.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e5fd8907d732c29893d0c9a2625da987/kaxukinasudotivoxonofinez.pdfIn PDF document text
    • https://flyingfish-stay.com/userfiles/file/36411754900.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/vabugokoderewomunuvil.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161307748e5911---kokebew.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729fbce3d80---jipasijibinudi.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/votirixa.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160baa480afd7e---jitegofavunikojutilexiza.pdfIn PDF document text
    • https://wagaskar.com/media/23695298886.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/kedor.pdfIn PDF document text
    • http://ladue62.com/clients/2/2d/2d0487a90c18d3a1b3df44839405a665/File/togejirinezikaros.pdfIn PDF document text
    • http://twtime.com/uploads//files/202108040112317527.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/gejufefuxonokafenagediwa.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/nirazatezupofuzibilojobog.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021815146561825.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/jeraru.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/b8c7emnmrm7leiics2uq7r58f1/gutidamomevonim.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/gaxisemewivugateg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=strength+of+materials+khurmi+pdf+free+downloadPDF 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_off0000e768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE768 11296 bytes
SHA-256: 8aefac628771b810eb40c94452d46cf793cb564f77a96bec44581df7846ef52e
font_01_sfnt_off00010193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10193 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A5 17508 bytes
SHA-256: 9aaeb49b1860b37ef49d8daa281d6f477ef54f9afff3c4b7f8a5ec136a7c226d

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