Malicious PDF — malware analysis report

Static analysis result for SHA-256 0daebf62c93e55fb…

MALICIOUS

PDF

72.6 KB Created: 2021-09-07 00:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ed42474cd19ce1586aa27045262671fb SHA-1: 6c40ff2aecaf501f5d155cfe6af15d517b0d7ba9 SHA-256: 0daebf62c93e55fbcb38cb733b391d7cbe48a37ae0933783e0b958a08a1e66c3
156 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm pointing to compromised WordPress upload storage and other disposable hosting. The embedded URLs suggest a phishing or malware distribution scheme, leveraging compromised sites to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://oryginalnedekoracje.pl/userfiles/file/93601538277.pdf In PDF document text
    • http://www.anjhimayath.com/upload/file/puzipisarad.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c19e58d8a517e7b2b43470517856ec87/musevo.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160b097d350278---93864471983.pdfIn PDF document text
    • http://juentai.com/userfiles/files/dadifebifaba.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/bafafapupisitiminagutilef.pdfIn PDF document text
    • http://4bx.pl/public/file/gakufodaninipa.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161213f3346ae9---83409323233.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/3b2589fe8611f8b73cec74bf3dfc70cc/36529686105.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/zopigokagenos.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/27894392683.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/f2e1d1eedf3f8974ff330909645f1a19/davinezetipubowu.pdfIn PDF document text
    • http://nhadephoanhao.vn/upload/ckupload/files/xokigas.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lapadidisoz.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608586661ae10---64738934298.pdfIn PDF document text
    • http://ccsl.asia/files/41988342755.pdfIn PDF document text
    • http://staropolski.net/Upload/file/keratevoxov.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/57414d3c41d1ce886a2784e0d53327e8/88205307278.pdfIn PDF document text
    • http://www.motocams.cz/ckfinder/userfiles/files/44497353853.pdfIn PDF document text
    • https://okvino.it/file/98534770398.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e724117129---82815600687.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/bugororu.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/bdcf32e33b8ebded62599cad68708a3e/kosojurej.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/67654507694.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b8a226f52---wamasi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=lexus+is+250+manual+2009PDF 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_off0000b716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB716 10656 bytes
SHA-256: 4bca8da0cb065d56eb8e93adf26a65d8c5830ccc866ae151f66eda6899afeb7a
font_01_sfnt_off0000cf8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 17540 bytes
SHA-256: 6a67c304acf9a5230137a17be22b7355bb6249e2d2eb3029d3b277c0da4f92b5

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