Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8d2641077a4898…

MALICIOUS

PDF

104.4 KB Created: 2021-07-14 08:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 578b55a4211c9ddee98dd330ce5845d5 SHA-1: acbf2f1c4bb2c0dee4116fa4c106172b5e979b0d SHA-256: 0c8d2641077a489816153fdb4ab703f355d0cac55cfcbeaa6540efad15c9749f
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a malicious PDF used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

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://inwebjor.ru/uplcv?utm_term=list+of+african+animals+in+alphabetical+order PDF link annotation
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/ltocrr38o4kkoi21qol2qe404l/xotopamogevizogaf.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/20731728975.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/c31b61cd9cb2be95bee2b0736fcd6a29/mukakapojowilokababejo.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/14596096823.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/94105260731.pdfIn PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/21602524752.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/10111351347.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/70893817730.pdfIn PDF document text
    • https://thailonghoang.vn/upload/files/7650771625.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e76ecb579---jisivud.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/48203692584.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8001b80448---kuvomutuvigodofofawa.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/ffd89a996bd8663f3fff5271d43b5141/74344306353.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/lakakarekututotoxujog.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d04a3dc49be---39938753724.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/xoxukumixuvuribon.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/lqrhog9b3ft9nbqp34f126q4b0/geditofosifodaxiwamikug.pdfIn PDF document text
    • https://asiajitu.com/contents//files/wavoderubikisigokuxogilew.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/fa8a7eb9586b5027e222b828c8d02f6e/49715218550.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/zemoxobe.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/92222941009.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/sazajusezusatixuvof.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/miraxi.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/ec39346abe85d183576c375b2f4058f2/2328196369.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/moravopisabazewesade.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B1 10980 bytes
SHA-256: cd5220bdf215730dcfa00df4d3dff3f840ba1fb40fc5125647551d521d586462
font_01_sfnt_off000139bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139BD 16684 bytes
SHA-256: 4fc63d86ee4112ed0764c3d73cc2f8d95831904179fa452616d90bcbba916640
font_02_sfnt_off0001650b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1650B 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_03_sfnt_off00017b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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