Malicious PDF — malware analysis report

Static analysis result for SHA-256 95571ca1d508fac1…

MALICIOUS

PDF

79.5 KB Created: 2021-09-12 06:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 373514a62434978c22ad5cff6d1fa9bb SHA-1: dbe177293de51b976ec8237b334bfde789c3fb31 SHA-256: 95571ca1d508fac15f967f00004b03d8428c77aaae75aa2acfc77439abea6bfb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=coc+cheat+mod PDF link annotation
    • https://webmenuplus.com/images/file/59271510135.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1d8298199---54516015585.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/gikitatinajaxupakofowen.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/devibetafugamumameb.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/8260214565.pdfIn PDF document text
    • https://fishuntpesca.it/file/54172206088.pdfIn PDF document text
    • http://cyuansheng.com/userfiles/file/fimutetadovevolaxawuj.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/kiziniresaligojuwepelowe.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/66136822462.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/wasexoxepusofizi.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/zikotubob.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/gupenofavebedi.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/25635021987.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/nomuvelutasawozuvune.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/46128591233.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/28788554551.pdfIn PDF document text
    • https://digireg.dk/upload/11132901247.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ejd58d4vrltvas8h39up3ee15g/46932299213.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/25447193085.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/78064786188.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/kumid.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/nodotova.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/59797946928.pdfIn PDF document text
    • http://way-of-spirit.ru/upload/file/31184485192.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_off0000d276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD276 17788 bytes
SHA-256: ca2447f151512c22c5a864f464b8ef3185add0e47b9fe7e65ab6faa5f794e83b
font_01_sfnt_off0001002a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11841 10156 bytes
SHA-256: 7e59b776be90600444c283a6cb045209476fc0df35005f63da2d881a8cbd72b5