Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcce071f52120873…

MALICIOUS

PDF

81.1 KB Created: 2021-09-17 09:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a761eee25bec43a210dd16d2b57b8650 SHA-1: d4ed046f9e95dfc9b0c3c2e3c8eacd736885379e SHA-256: fcce071f5212087336418ced391aacc472de2b10d1ba0d37d2921a93c9949425
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the PDF structure align with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cructi.ru/uplcv?utm_term=android+games+with+xbox+controller PDF link annotation
    • http://midel.me/userfiles/file/38357980185.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1614038ae7efbb---xekexibezatebagunavin.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/70136184656.pdfPDF link annotation
    • http://werder-ritter.de/UserFiles/File/65107757906.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/37190098006.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/38689813108.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/sijevarobafitan.pdfIn PDF document text
    • http://highlevel.pl/userfiles/file/26827971184.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ea50c81bc---lulusedajigevikokilatevoz.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/91290633869.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66315123804.pdfIn PDF document text
    • http://immopolignano.lu/images/33508840359.pdfIn PDF document text
    • http://mrpennarak.com/user_file/file/gibesalelejatupubox.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/16013308932.pdfIn PDF document text
    • http://seosanhrd.com/userfiles/file/66537712403.pdfIn PDF document text
    • https://pmrmhss.com/userfiles/file/8331924050.pdfIn PDF document text
    • https://edusfera.pl/upload/file/82536995249.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/25075151846.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303ec65e323---28150351009.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/90868760192.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/tozotunusizesawepoduk.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/vajuderenuvesaraji.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/55035244641.pdfIn PDF document text
    • http://www.hebrewforreadingcomprehension.com/content/dopiwelamu.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/73376679001.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/wakemomofadamu.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/45420957712.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_off0000d871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD871 17036 bytes
SHA-256: 57d6882f74faeceed0b626fcfa0c27486d4204ab5e39cb42bb011f552d57a81a
font_01_sfnt_off000104ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AC 11128 bytes
SHA-256: 6e46b1dc59dfb672c8c04da30097ad06e952c416acade492729718b550d54cbe
font_02_sfnt_off00011e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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