Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3167cafe274e6d…

MALICIOUS

PDF

70.3 KB Created: 2021-09-23 18:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0ef90abb17f874d25c306ed1315e1c71 SHA-1: 5b47f0008eab8af2c74e2747ae3e5da9968d72b1 SHA-256: 8b3167cafe274e6dee0f23c71e05fb688d76f8fb4564b05d5c6ff3c3f4dc2e5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which are associated with link farms and compromised CMS uploads. The heuristic firings indicate a pattern of link farming and the presence of malicious content, with ClamAV specifically identifying it as a phishing trojan. Although no scripts were explicitly extracted, the nature of the URLs and the PDF structure suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://laborke.ru/uplcv?utm_term=extreme+landing+mod PDF link annotation
    • http://talk200.com/admin/admin/uploadfiles/file/dewulovejowinuvekogat.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/56705127163.pdfIn PDF document text
    • http://xn--80aer5aza.xn----htbdepbihnfb8cyg.xn--p1ai/ckfinder/userfiles/files/33242850227.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/dedolefunipigewumusi.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/regumugunepigep.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614018d6d86bb---kivukokiwozulevodebewif.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/c80d987a91776e8b8a212dec2ce48839/fumafadodudaxotiloluruzu.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/xukibuloxig.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/wurigenademi.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161361418379af---bakujedut.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/33272335658.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/6022295754.pdfIn PDF document text
    • https://brillimet.com/uploads/files/202109191521428177.pdfIn PDF document text
    • https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/28797977695.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/pudezaxejubusi.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149491d5f3c0---vokafagifufuxogub.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/49641963577.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/ratede.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///lomizokidaxaxepi.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/90138561462.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/derul.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/9a0ece284d792b13d61c08b81f51b3e0/majuwejewiba.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/kevebeveleda.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/juruzuletanowarobazos.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/95697191202.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_off0000b3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD5 16180 bytes
SHA-256: 85d06426608c00fd1c0dcd0138ad36252406b63a117f660e3de5a4ed0481c9f7
font_02_sfnt_off0000f47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47C 10508 bytes
SHA-256: d86ba271b0cda015e9a61da0dd4bfb0ed1a4ebbfe6cf0e1cd4187e9235ab2f90

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