Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0262580fb00897…

MALICIOUS

PDF

91.9 KB Created: 2021-10-19 03:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a86ca2bdbc5866e54544a8f8b1df4b68 SHA-1: b6d47cb91bb56ca41f828df81ba19294de73b977 SHA-256: 9d0262580fb0089720526e903ea5f87190501a3adce1906334e8218849ea743b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress uploads, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://allytemp.ru/uplcv?utm_term=auto+reverse+forward+motor+control+circuit+diagram PDF link annotation
    • http://marklaliberte.com/fckupload/file/sosej.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16166af28a8fd8---92234115943.pdfIn PDF document text
    • http://safarang.com/basefile/files/rusot.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/3c613b844c3fb95d9cb0bfac80bc96a2/sotodurawuzu.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/80008690791.pdfIn PDF document text
    • http://eltprof.ru/userfiles/file/61562919863.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1616ae2a7857bd---sivivepebamumew.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/77673887204.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613b45e26a925---mugibaxipazisetawiburep.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16161b2c62a45c---65517383474.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/c48a150d78f6a3d5a8fa6edfcbf5fa34/puvawirawewamir.pdfIn PDF document text
    • http://neteyes.eu/editor_up/biwez.pdfIn PDF document text
    • http://lapmaymn.samdigroup.vn/app/webroot/upload/files/galamidanoxi.pdfIn PDF document text
    • https://maria-galland.ru/files/file/59918263237.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155a670df32b---wibogiguripimufiroduje.pdfIn PDF document text
    • https://eledigitalpr.it/allegati/file/zikuxigebinumegopomi.pdfIn PDF document text
    • https://0800-707-808.com/upload/ckfinder_temp/files/20210914165839.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/jelovigibaxe.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1616ac3dbcbc04---taxuruvunuzipupi.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/betekapepafejefetemozek.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/nulepibidiwanerobugula.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-10-11/20211011230119881875.pdfIn PDF document text
    • https://wwa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/32826010619.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/46911390425.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_off000101b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B3 11052 bytes
SHA-256: cba2d25e736c363055e3b765f1e3cac1fb97861732c54229bcee90137e04e43d
font_01_sfnt_off00011b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B50 17644 bytes
SHA-256: e5ee409d3c2689a82d7168dc5148ed5d382620a801b0a06be70aa1407d4ed8fe
font_02_sfnt_off00014962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14962 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1