Malicious PDF — malware analysis report

Static analysis result for SHA-256 308a5b0f8bbec3e8…

MALICIOUS

PDF

81.3 KB Created: 2021-09-03 08:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 741148a379f9e0036f1e685b38d36179 SHA-1: 1c7866c868f455d9d1100a9de69d8402aae3a292 SHA-256: 308a5b0f8bbec3e8a99cc9136a11088d04f690cd51021d29ae942a024b4cdbc6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm used for SEO manipulation or to redirect users to malicious content. No scripts were extracted, but the presence of numerous external links strongly suggests a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://pixomot.ru/uplcv?utm_term=can+a+pdf+file+be+harmful PDF link annotation
    • http://qianxish.com/ckfind_image/files/56952154157.pdfIn PDF document text
    • http://skncn.com/u/files/mubifuzozaruwagakakob.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/krf8v7flteh25vtaskt62c64e3/27899337888.pdfIn PDF document text
    • http://4bzsoftware.com/Images_upload/files/26442784270.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f1f0cf55b---lapivube.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/eefe4555d11b272b9f4cf0c7264d66a2/84740431606.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/3f6bf2ff048e32f533b667ab48f2c90d/74397998105.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/49f7bf199c31c7704aa13c2e7b34d5c3/74793084958.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0d355ea5c---mufesezojokiwemo.pdfIn PDF document text
    • http://doyen.cc/images/upload/File/69650202290.pdfIn PDF document text
    • https://bagstyle.uz/images/file/fubisefino.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/lufosupelisiponoxos.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a8f5e0bd7---pekidusenifidikizej.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/ita6oi0a4irs8tit5su921vll3/luvanepoponafu.pdfIn PDF document text
    • http://ministerium.pt/files/pozogadamudu.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/f5ba1b7f92b1bf39c42c85e576b168a4/kesizutukilewozas.pdfIn PDF document text
    • https://wrd13.com/force/file/63855955637.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/92923645075.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/jasuf.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/f601f43a5d9272267b90e179d3f33caf/781959579.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/palux.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16108197d03de9---murakapamex.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789be48a8f3---81210389098.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/69657493885.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/78118460209.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/pifejabope.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_off0000dbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC9 17008 bytes
SHA-256: 65f3567e34de2a720537d31d0e99b4dbe16dfb85c11037b2f65f8f804c1c12ee
font_01_sfnt_off00010777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10777 10648 bytes
SHA-256: a924018e6f34e7114dd037327ce661b9d34efaf195a3a2cfadc05a57a9dce559
font_02_sfnt_off00011f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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