Malicious PDF — malware analysis report

Static analysis result for SHA-256 be8d63b2d2b32f4a…

MALICIOUS

PDF

72.8 KB Created: 2021-09-21 08:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dde0e16fa4b090922dccc467720fb849 SHA-1: 6046f7745064bb40016fa309a6db5d3975772e10 SHA-256: be8d63b2d2b32f4ab720de278ac320663be39d9d1c13caafb451bd642f9da10b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://smidgel.ru/uplcv?utm_term=utorrent+pro+apk+download+for+android PDF link annotation
    • http://olech-rzeszow.pl/userfiles/file/migot.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/14995722331.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/164371bbded6eb3ecd8484601f45f280/75000227861.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/zofezalakiwogakosuxerefu.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/f6eacee43a91bb3ec6ff0a34b3364b19/42382077097.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/delesogip.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/54645418790.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/12927121718.pdfIn PDF document text
    • http://lobi.md/userfiles/file/2229654961.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149101fb7ab8---86660936253.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/lovagupoxofuluk.pdfIn PDF document text
    • https://bi-kiesabbau.de/cmsimple/images/file/fapinejilesab.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/71837559556.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/ripopuk.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/wosuzixukusetotojafa.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/1540b9595eae9380eb5eb304046434bc/54534266991.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///44811102428.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/vubilipofipoviromupafevan.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/85829060458.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/pozulefereloviv.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/famikuxekazu.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/50124291299.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/81963253731.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/24561582105.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_off0000b978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB978 10508 bytes
SHA-256: 52757c2da199443c64e646529d166206a0162c8a025e1846e6ebea16b643ed7f
font_01_sfnt_off0000d178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD178 17340 bytes
SHA-256: 1e729a1584511f3328288007f09cbc36de5567c7add5fc913bf7076983c4a53c
font_02_sfnt_off0000fda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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