Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb08f42b824520e8…

MALICIOUS

PDF

90.4 KB Created: 2021-07-22 11:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 51451fca63413018e4caf1026f5d5da5 SHA-1: 56cac65210ab3bc40b875fde85d34ddcbd5ad363 SHA-256: fb08f42b824520e8d2a9c3706c2314fa95d4016207c055aaa8f8e79d5ac1caac
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis point to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://laweasy.kr/userfiles/file/xuxatula.pdf In PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf3e06f7a9---fokadivegaropub.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/nob9r3i9h8gvjr28379ubs2k93/1472047804.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609488c2da61d---xevisiz.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed24a8c292---37429445020.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/7a23519f326f0cc4c0eacfa66380f6b2/78194783713.pdfIn PDF document text
    • http://lighthouseofworship.com/clients/44803/File/51335696015.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/xijoruxisebetabuw.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/501cd6744dc28f931e0d236db2078165/zojuvofakagejog.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/51754599289.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/tebowavubamibisolosuw.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8a392b66---kesuxoluxebusaxezevipaxu.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/68bbf20ae410cc06228ab12f87d54c09/dexorasirabaw.pdfIn PDF document text
    • http://ezibra.pl/upload//file/gusezonusuza.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/nipaver.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/sm499mrjs6sjr0pcmj98qrk4gu/fugolovupigisaxorejud.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/qk44e70v75i59rt4hpngm0tivf/49789543606.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/acbfdd74e397827e30241ec2856b0d4b/libopokenoruxijugez.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/zoxegisagu.pdfIn PDF document text
    • http://ntrc.biz/clients/f/f0/f0759d16aca5b3dfc9163ee994587b7f/File/52327486073.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/cd062bcd285a1110702eb596d13618ab/wamisurisixovu.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/89527725212.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/92ea483c255840e1d1ca8dc4b984de1e/67449506234.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/vevidibuteranolerigike.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=shooter+movie+onlinePDF 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_off000100d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D3 17168 bytes
SHA-256: 9d791af083f9e5be96d09274964ca4e2d53161e117956069a89c453846c1d89d
font_01_sfnt_off00012d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001454f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1454F 10184 bytes
SHA-256: 93e425acd26846eeb9716810791074721c558c9dec9eba2b9e05064a67b12204

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