Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4bfeaa772cd4ffc…

MALICIOUS

PDF

87.0 KB Created: 2021-08-15 07:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6466538718073309e257d5c92e1fdc8d SHA-1: e109c77f0e9909488d02301c2bf28db2d7d93e61 SHA-256: b4bfeaa772cd4ffc05a90739ceadf2bd45f083ff046ceca8eb19dfc24d00d555
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://allytemp.ru/uplcv?utm_term=descendants+3+full+movie+download+google+drive PDF link annotation
    • https://arhometutor.com/userfiles/file/kasodiwozeg.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/39120925264.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/b5d4059e91428c31e024284e66cde609/50202245039.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/xiwuzipe.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609c619b9cc22---6703224899.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/rnpf40t6k1ears0o3vkjipikeo/78512672163.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-6-4/20210604213630683753.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/wuzirofiniluxupunulepuz.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/kosumikobiloluvevamo.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/088c5f3670dc8d48c749470d098e5299/zerogamazogoxodutodin.pdfIn PDF document text
    • http://1976ahhs.com/clients/32223/File/jetoline.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/27080433245.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/73293371503.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/27003849833.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/10051910064.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/0a25b5ef68080ba359aef6d9eb87fd00/63792388194.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/115e5478d2b0492b7f1e593dd31a4d95/sijenanopoluf.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210806_32E2CCB7483AA347.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/20848735598.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbca942e25---4445603621.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/batapumi.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078079586464---75534327568.pdfIn PDF document text
    • https://uaatc.com/userfiles/file/losukev.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/rebuv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE0 11244 bytes
SHA-256: 55d815e9b9ee184a63a1baa6ca1a1a09a520792b6ae1d02bf04c9ab98a59b27f
font_01_sfnt_off00010728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10728 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3A 17772 bytes
SHA-256: 93a8ebc63a56652e5b92cc6f670390501da9eab8196a1235fb721ce7c496fe38

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