Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa14480c252d5ab…

MALICIOUS

PDF

85.9 KB Created: 2021-07-04 18:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: eb95a576a6935cd8b7e292fceec8a752 SHA-1: 168d54a8e45f729dbf2763b31a377502e4f1014b SHA-256: 5fa14480c252d5aba0da2a1da6be1e3bff8ac66fe9849f4fbb71945c5b6e8611
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating it's likely a phishing or malware distribution lure. It contains numerous links pointing to compromised WordPress sites and potentially malicious domains, suggesting an attempt to redirect users to harmful content. The PDF structure and embedded links are consistent with techniques used to host and distribute second-stage payloads.

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 https://drafthe.ru/uplcv?utm_term=clownfish+voice+changer+ipad PDF link annotation
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a875365e65a---74685905258.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160874d6b2c7b9---93114155682.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099209bc08a5---sutijuwofoxobar.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160877a4d8745e---nuzitevagusenebebo.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/fikidujupab.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/22cbd8e6c44fc1434d9ca5645457dca4/vowixowodetukawewazep.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781cdfa0f9c---zajizuvubilulajufupegug.pdfIn PDF document text
    • http://df-2.de/images/daten/file/9646028513.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/tagafinewokuvexabumiwubi.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b642fabdeff---68815979131.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210627_657C76B3211E79E2.pdfIn PDF document text
    • http://temple.mo/userfiles/file/28865661725.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/86340026731.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607312c993a3d---66075330637.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/52705757942.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/nqgedgc2s4rot8iji3ifrq1n51/12393826822.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903fba182d8---pegeseza.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081ddc134b96---24199813586.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/j5krscv1j4097sn78u2g6hagmg/11919614147.pdfIn PDF document text
    • http://innotack.com/userfiles/files/zasareva.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/jokoxamotixusexivufudexeb.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/maserowowaxolilojoromap.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607654d08bbbb---gobozamije.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/83764675555.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_off0000ec61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 10984 bytes
SHA-256: 9bf3118ab14763cba0ec69271a5e93614bf6fb91d1f64904b9482c24bb0d7776
font_01_sfnt_off000105b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B1 17100 bytes
SHA-256: d705cc7cf2a6d55cab739109b8a556bffdd7c625e2487d636138af3e1e210238
font_02_sfnt_off00013293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13293 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1