Malicious PDF — malware analysis report

Static analysis result for SHA-256 6379cabb2f80a7bf…

MALICIOUS

PDF

211.1 KB Created: 2021-07-01 20:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 14d257a9ee716cf0e2e38a0463516210 SHA-1: 64dc4cee7030e9f851637c7ebf45449d487139e7 SHA-256: 6379cabb2f80a7bf6873cfa92af6d1e5cec67689947649c1d7fe0177dfdde782
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The presence of PDF_SEO_UTM_REDIRECTOR_LINK and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics suggests the document is part of a phishing campaign, using redirectors and compromised sites to host malicious content. The embedded URLs point to various PDF files hosted on potentially compromised web servers, likely serving as a lure for users to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9772

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://queure.ru/uplcv?utm_term=sx500+is+canon+manual PDF link annotation
    • http://adaviestransportltd.com/userfiles/file/xijemadomipuxosinew.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/87984556166.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095e4092c66f---23756156963.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/24789761827.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f45e7d1498---35067671477.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/6544998350.pdfIn PDF document text
    • http://capitalclassof1971.com/clients/4/4c/4c1e4f015ba9b8bec237dc1ca705466d/File/lusetudefotazoxu.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6c29ca2ad---turuboziroxajo.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/2745720240.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16077a597a4b81---sudadufujose.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/39219379698.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/3subqab14tnpkagp243srvkkvf/13891100985.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/67454251260.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/7c85d067193459fb2f59475495fd8dab/50918716068.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/p1p3v1uqev60c2p7rutl7bjk33/zemareguwuwakume.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/kt1v2uq0q362jh008vc3n3kho4/fajixemefugigelonosudu.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/79293832555.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/9372d67de5e4a3ad9fc38ea081c62d95/19949372728.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/vivamofikuwo.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/g3m9qk1ouniph5ant2t8ti9mm7/ponomaxitig.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160807e6aec9e8---32846140330.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/42244906236.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd70e67601c---tusifa.pdfIn PDF document text
    • https://shidoremicrosys.com/media/jusizodedegekijepe.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002dfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFBA 18188 bytes
SHA-256: 2871a0db64df76b0af426a3f98a81cad633746df6f8ee8bec0e9936d8448524c
font_01_sfnt_off00030ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30ED6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000326ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x326ED 10592 bytes
SHA-256: 9ecaa986f3eec36454f0bf59ae35f2a0f5a240e0170519cb70eba8d31f5ffd5e

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