Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e823348286184e…

MALICIOUS

PDF

97.1 KB Created: 2021-09-08 12:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8040d59316ab960e19e62a832651dc62 SHA-1: fe30b8d6e3081c7629bb7b9437b0709fb66f2867 SHA-256: 68e823348286184e1a118bc71a5047bc69bda4e1d9b070c3fb083ccab42683af
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm with numerous URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content or for SEO manipulation. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/21a8d044c4296f91eff9e79528ba0b8f/vifusopaneraz.pdf In PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/ee03f6d2b5ac6d868122c14eaa9ca8b1/21463258513.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/a0861a714e5646bedf7411c3f0fa22f4/mapofelejerefaxasejom.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/jiseravinakupidomivu.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/bukojoguzoj.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/patakomamiritugixogibole.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/22533948717.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/313a3e54c1bd581e18453fb2113cf545/silul.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b49eb96b786---wuvapisokusiza.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/3dsbanhrnoe29amtf44omkl603/56787730648.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/021d6aa7544282277fcf067eb0608bbf/lebek.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d5068f5c7ca---84209209857.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/zurutegurilu.pdfIn PDF document text
    • http://sansboundaries.com/clients/f/fd/fde0d4b6b324343791c5f0705b221951/File/67617049289.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/dosurigewejoruloliv.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/tegiwazedelumowewubivav.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/wukozevakagivibametu.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/17937070119.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d0e4252ff16e1c7b239de1c46853a969/zepuxirizuvop.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1ab1d552f---bosoromirilimal.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/77695291510.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/15ba3b43868ec67eb37a27b1192c2056/24260456877.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160793c16933c2---vaxinozigudetuzemukut.pdfIn PDF document text
    • https://halkapsikoloji.net/userfiles/file/tomawatosejujezakexu.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e92b2b0797d---1809044027.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+speak+english+fluently+in+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_off0001140e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140E 18708 bytes
SHA-256: a6b70b3a62fdea04a5d418c10890263cd501e2bef80ed5ccab415044784dfdf8
font_01_sfnt_off000144bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BB 11060 bytes
SHA-256: ad67e0a7fb3d27439d48cd797af4364ee51112855563ddcde34a12ce6b2a2008
font_02_sfnt_off00015e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1