Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad01b94220706ed…

MALICIOUS

PDF

78.2 KB Created: 2021-09-06 03:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 32162daf0ff4de68d068440bbac652db SHA-1: 4536561fca4d4ce9a3a96fb0fc1a283ab3212d8a SHA-256: bad01b94220706ed2eca0b0ecf5e9ab54d1f5ff61d84c144f4780bb1e1e64fb3
164 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 websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. The heuristic 'SE_URGENCY_LURE' suggests a social engineering tactic, though the specific content is obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://synerhu.ru/uplcv?utm_term=water+treatment+exam+questions+and+answers+pdf PDF link annotation
    • https://eyetracking.pl/userfiles/file/wefakanuve.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e643cabbeaa---26336756394.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/selugub.pdfIn PDF document text
    • http://humanlitech.com/files/files/jiwegowe.pdfIn PDF document text
    • http://accronline.com/userfiles/file/20474002157.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/busolokumiwep.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/77750208698.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/zazirefapoluzitewakep.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3f4967f2f---jupawozazigekiwidusu.pdfIn PDF document text
    • https://esz.jp/img/editor/files/jizamusimalavapez.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/1269977252.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16087f9ffb4681---44948328333.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab24d7e41f3---24730344373.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45369041400.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc270392bcf---49275428317.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/wutomewoxumorede.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/19235238841.pdfIn PDF document text
    • http://canvangdientu.com/images/file/36677909331.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/75767859551.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ebd6adebf---ruset.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160793d8b9e1b9---61636139522.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/49962454920.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/355a3f3554ab55d369479f5a932a60f0/xefimidobujebazewatazed.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_off0000cce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE1 11040 bytes
SHA-256: e5252a1e5c8bdebb2d91d3b13e9d74997400878351401db7574774a044809ecc
font_01_sfnt_off0000e669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE669 17324 bytes
SHA-256: 361d7c1bb57c0cd852718be905ef5fac3cc1cdaa0b60fa0e738b5cb93db28efb
font_02_sfnt_off0001134e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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