Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae67e4295c3a292…

MALICIOUS

PDF

85.0 KB Created: 2021-07-07 07:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f28fa1a91e508d0c1b456cbd6d60396e SHA-1: 7c1440f1227ec6021a5dcbfe035a52f386cb77ef SHA-256: 4ae67e4295c3a292fa11642951d48b0a9aacc7c47ddebb64658ade6f669edcbc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is unreadable, but the presence of numerous external URIs and the 'link farm' heuristic point towards a malicious redirection or download scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://pospatrans.cz/UserFiles/File/dinaliwi.pdf In PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/dbb3be5c7ffbda81da24dc5dd750db7b/lurulepewevumepidu.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/2sp576jb67o1fpo50p5se403g2/14894245635.pdfIn PDF document text
    • http://jngf.cn/files/file/70937553683.pdfIn PDF document text
    • http://atek-ent.com/upload/file/80708287978.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/fowikebaropabojon.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/53382234585.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160ba78d8c2d35---vaxeresabex.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/6243ee399383f35ccea2eb128d876524/15816268875.pdfIn PDF document text
    • https://ka-base.no/images_content/file/vejamutovogufokorexo.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/sezetuzifesemeg.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/366a86e4a114cfdab83556301f2ed603/63486464767.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840bc084f4a---40036188750.pdfIn PDF document text
    • https://mimpishiodua.com/contents//files/23851523406.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210704_014634.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/zizobaxug.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/6672058597.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cb67f9bc8dc---65059814965.pdfIn PDF document text
    • http://myphamasia.net/upload/files/wuwaroxefisex.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160867acaf0798---pemisukezemufaxinomo.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/12768559886.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/wozowapipilawa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=free+video+editing+software+for+windows+10+without+watermarkPDF 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_off0000e9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B6 16332 bytes
SHA-256: c5e6bd322a0bb220102c6fd8c3c09733fd1d4d37023b3b09642bac8e8f8e6657
font_01_sfnt_off000113f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F8 11252 bytes
SHA-256: 28eca8f904cf03c498237fcf281a1c55805161b4c5b14ced2db14e90547e3c32
font_02_sfnt_off00012e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.