Malicious PDF — malware analysis report

Static analysis result for SHA-256 17989b84a703a1fe…

MALICIOUS

PDF

310.3 KB Created: 2021-06-28 02:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0a54af9b830d2c1e069cb7ec84cf657d SHA-1: 4a1f0bd519c419ea518e57d46bfe9e73e1b634d9 SHA-256: 17989b84a703a1fe51cd3420cbead6fba3296b129545445a23d353f11b8f55b3
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains numerous links to compromised WordPress upload directories and SEO redirectors, suggesting it is part of a phishing campaign. The primary lure appears to be a 'free download' for 'current affairs in marathi', directing users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/3bcbe5101b3ef34d5fe97bac47c06680/gured.pdf In PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f02f84cdb8---96095130627.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/63509569195.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/rjk2d9ttm0ti9f186v4ugneg45/18630793274.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/044991bfabe09d883f7801c55ac8942c/rokan.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/58df56f86a25f1c5a57b57facddd2004/79053635291.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609236e5b1327---78464835298.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/292cea19df9ae472818c0267e53b1279/17074436634.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/megaxutidogatije.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/tixakanibob.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/vavifow.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66185575be---48789202959.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b0440ddb2---bodatixebiwunofabara.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcaa7ccccb---28849382262.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/82406790446.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad2cdaae6f---58491699279.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/672047477b354b28a8686f1433320e9c/serawafelagiz.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e796f4a7f9---86605649317.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/midozavadoxoberepos.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/2obg5fofll8pjcmjqqjgn1m9he/80435880069.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8694c02714---jiragujakofi.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/51795611986.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/demewuvotovod.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/e68d5c9c33b3350f8de21eb06e1d687f/juperuzipuxibumuwadap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=current+affairs+in+marathi+pdf+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00044505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44505 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00045d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45D12 3972 bytes
SHA-256: 1e05ec9413f31fbfcadf6da43e73fe3c058eb3aaab4bb7280b13104754dd76c9
font_02_sfnt_off00046c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46C4B 10980 bytes
SHA-256: 2f38f70aace5250fab4f15cf77d762847b6a9aa5de26b6032788efe4dcf13bc3
font_03_sfnt_off000485a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x485A2 28224 bytes
SHA-256: 76eb137351b32500f06952b3762c89aaa0f3451805fd4654e64ff3fcc6076ce1