Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef45a090560e055…

MALICIOUS

PDF

83.0 KB Created: 2021-07-28 06:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 23d0acf060ab1a079d28ec832780e7ac SHA-1: 15843bffa7a1eb5d8b5d9fac885a2af6f1c27867 SHA-256: 2ef45a090560e0556b3918073f515d35a62ea59e9406a1991f01748f0ff5ec24
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious external websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://lookkorea.net/userfiles/file/keniturelip.pdf In PDF document text
    • http://profesniprukaz.cz/ckfinder/userfiles/files/larozaxofol.pdfIn PDF document text
    • https://gazelletr.com/userfiles/files/bamezilimul.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607066d611c91---puzimi.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/3mhve1feggpe6jjoucrho48o4g/kosaweluroluzugerok.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ba75c8f7b---60348480358.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/74482166373.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9vfgopkurgd0kpvsmpfgiike43/42593402403.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/92e0983385493451833d66215b2260aa/97246173600.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/giwedojanum.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/cc01c1d68202fb447a3e7bb6bcc52f0c/62994055870.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a96664fa---88616005940.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/e3511fb5640699550e9defe629f839e5/39816823170.pdfIn PDF document text
    • http://teamtrinity.net/trinitya/file/lekazebiduwa.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202105/file/1620963535.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/mazikijiwaje.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/nojomifitisaxeritipaga.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/fibefulumifepadik.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/zebupisajofisofoxov.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/4g4cg45mf1kr86akjnbugdmk96/85898364317.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b18358d33---refizitosozuve.pdfIn PDF document text
    • https://hirurgija.me//files/gugox.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/fidugefamino.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=joint+commission+standards+for+operative+reportsPDF 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_off0000df87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF87 17408 bytes
SHA-256: 06e5ab4cd1c8ea368e72346dda18b6600cf2a5bd56a1da7a691716ab118b1a9f
font_01_sfnt_off00010d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12572 10792 bytes
SHA-256: fe3cf928d6e6de38f580f6d43fd3e7a76ce319c28852f8e3e7297fc0c1475271

Open this report in the interactive analyzer, or submit your own file for analysis.