Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a520f49b1b03aa…

MALICIOUS

PDF

83.2 KB Created: 2021-09-08 05:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4e3533be6c8616fd7330baccfbdfefb4 SHA-1: d2f2a7c051d2efba6282268beb7c5818bf781d20 SHA-256: f3a520f49b1b03aa0c661d599b13a66e84283c2f9b51c20f9332d59e04ac3c6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm directing users to multiple external URLs, with several hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack pattern involves luring users to click on these links, which could lead to credential theft or exploitation.

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://ccaquebec.com/userupload/files/90041695323.pdf In PDF document text
    • http://pinturasoltra.com/images/slider/files/fuzujorima.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/34682189004.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/gunilazivodonak.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982b96ad43c---jazipo.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a90e6718bb---87575568372.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/sisagetetovewutelivugi.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/vkopdmj39fbriv6j25q7pnbgp0/57823371678.pdfIn PDF document text
    • https://thieumaunao.vn/workspace/develop/uploads/ck_upload/files/60626756120.pdfIn PDF document text
    • https://cristalensi.com/public/File/15045269816.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/99507631311.pdfIn PDF document text
    • http://0048.pl/48files/file/kabinaramedo.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/wemipemulekobip.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2160d45a3e---bopaputufazuris.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/wimup1622334422.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160986f4932df9---kiweniduvivolibo.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e6f358218964926e1409c750d9e07822/74244836030.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/3c1a8c5970075a210035c6507e96cdbe/82407830596.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/57703278856.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/86725834171.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609848fe90265---89033648321.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/d80d9cc173b26dd81f2f843ab53006e2/safatamapowuj.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/sujuxabagivaxazuluwo.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/togikofuguzeroxin.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608244a23b864---kinorekome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=fences+play+pdf+august+wilsonPDF 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_off0000e186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE186 17232 bytes
SHA-256: 5ae33e1e3d67531d5c101aaf0aa53b079953d861d90680b09fd53e64e7872839
font_01_sfnt_off00010de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE2 10972 bytes
SHA-256: c0177d0dda8b874625721a5a1a12709947016289d70cc834554f1c85f4ff22bc
font_02_sfnt_off0001275d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1