Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d5969c592fe383…

MALICIOUS

PDF

85.8 KB Created: 2021-09-05 14:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3b7ff7b02ed7302d42cec32ee72de4fe SHA-1: fb2bf1c59f037f37029ae2c1a604219b3557211a SHA-256: c6d5969c592fe38336ef828f59e2e3491db08ff55ffc4abc72f79c1fcaf08ccb
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gemwares.com/userfiles/file/vawipamamasejome.pdf In PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/60512934603.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/89262768465.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/56624586916.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/87317030128.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/70122761788.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16076cb81d6271---reriwikuxami.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16112d714a978a---patovunupatiwisotupozuwu.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/9d8c2d564fffd3b300703775c186b207/ridaninefurenulofudenave.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/1765850180.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/34db04f9687b4356c4d552683254fc8b/74549362557.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f208998743---22534953559.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/gajigukepezeval.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/45342717360.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/mivuximakolutugazila.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/hg61g2itlha4p7h3knl4er42u1/dilumimupifa.pdfIn PDF document text
    • http://pazarziraat.com/userfiles/file/tujakilupipokok.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/luvotixabiwebetovu.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ffe7ce78a---noduxep.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a235371a9---rabuvurowinigodofisezo.pdfIn PDF document text
    • https://datajournonepal.org/files/ruveriragezunelinad.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160a98acd70fbe---mofijuwire.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/57930531242.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/xipilatizefojofokogupiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=stepper+motor+interfacing+with+8086+using+8255+pdfPDF 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_off0000e6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 12032 bytes
SHA-256: d5b6c36995069820d3589f3600cd78a3cef472be12472db2d167fd3697f70d1c
font_01_sfnt_off0001039b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAD 17620 bytes
SHA-256: b026bee38e04f60fb912b8171c8235ca477fcd4df136b6172b3d33710cd18abd