Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d76ccde0a369ed1…

MALICIOUS

PDF

373.9 KB Created: 2021-06-30 09:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d95a0e089c769ceca8443e10f2fb11d9 SHA-1: 8281bbc1ec66aa3a3f4673e795c584961e09e178 SHA-256: 7d76ccde0a369ed12ec969d0250162bc841050443fa5e9d13e3d6769faed36fd
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF link farm pointing to compromised CMS upload storage, combined with an SEO redirector, suggests a phishing or malware distribution scheme. Although no scripts were extracted, the structure and heuristics strongly indicate the document is designed to lure users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9792

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/782a7669a2e74ac8887e0f55885c822d/55418599622.pdf In PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607010987f59d---bugumubujinibipet.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/51573087638.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/06face30c8405acb2ebb89439893e369/65255072220.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/5iop5hq6vjefs2idnhk61imuq3/76816793456.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/daxedodevipadewosowezom.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/32879066033.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/34143541661.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/6778b1be48046f31ff97f1a5c6012954/giraj.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606efe2c9297b---27609916730.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c02d3fe25b7---34827688480.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/030116459597.pdfIn PDF document text
    • http://jorakaygame.com/ckfinder/userfiles/files/58760227085.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/zixop.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/6qe4lqltphcro098a9v3c4i2d7/52501052980.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/96068869402.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9497d6dfc2---petafowidoviru.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2703e3428f---lixipuxe.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160be660e34a7e---39659331255.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f248a58300---39974655465.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/9df87d78f2e23a61dac0fb84f917446a/64371239765.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/3gp4qia52hdvmuaa928cilb105/tovexaroserudalafa.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/e1b1e85e1b7a8c269a1664c4bf13e42a/87305542350.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-7/20210507153502659453.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=63kg+in+lbsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56CC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000584d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x584D2 17452 bytes
SHA-256: b8ad75f82d124b30a497fd6591c5275d10050d153254e413fba3f3f1ac8797e6
font_02_sfnt_off0005b278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B278 10144 bytes
SHA-256: 09626db48b07eaf5d3c50be19470883ae2e97e960b7bca1c61e629d5ec3b10bd