Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0e95a5800c9ddc…

MALICIOUS

PDF

82.0 KB Created: 2021-09-04 14:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be3cccf22e4d32b9950524c3ad38672c SHA-1: c5e98fe536c7de07c0e52c4728820b5620f349f9 SHA-256: bf0e95a5800c9ddc32f743643eb9c70a328a16000a9fc59d01a05c0cb1028894
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites, indicating a likely phishing or malware distribution scheme. The file's structure and URL patterns suggest it acts as a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wastran.ru/uplcv?utm_term=archicad+22+new+features+pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/brrkqh3a24lmgpkft6s3rudrcp/vunegigobotiguwumikixaku.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/15c224fa95b47b83a48379f8971ed883/85978173182.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16071052d7f47b---ralisuxigidesagozozewew.pdf
    • http://phantasos.org/userfiles/file/sikupanulowitenuw.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/e0e3b0588b0e2440de99f2c5747cce88/xoxaxasotemedegu.pdf
    • http://amirafouad.com/uploaded_files/file/sosekilebikiwixes.pdf
    • https://coluer.ir/documents/file/63244004181.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/8c63od0h9bt56bs9e5iab2vp1e/wulukaroxedik.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160f05c902c4b1---konosojaki.pdf
    • http://awards.nl/img/cms/file/rimewezizajola.pdf
    • http://dermatologomiguelgallego.com/miguel/fck/file/suluze.pdf
    • http://netisiletisim.com/guvennet/resimlerfiles/62916628087.pdf
    • http://chiengthai.com/file_media/file_image/file/kasote.pdf
    • http://magnumprint.ru/upload/files/99174054420.pdf
    • https://medtek.vn/storage/file/63575017652.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c23e470649a---14521918621.pdf
    • http://wowbond.com/upload/Fckeditor/file/devogak.pdf
    • http://cokhihoaiduc.com/uploads/files/77653666269.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/t74naege95vugvn8vhukvf2fe1/sulofedenosewopovosuw.pdf
    • https://hitpoint.tw/userfiles/file/tujupajaxavafevemat.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/77aedf17161e8f553240a248f1764c1f/jimifojiwedeb.pdf
    • http://eastindiaspray.com/suvra/eastindia_spray/files/52446648371.pdf
    • http://giustizianuova.it/userfiles/file/jiwuxadojigunem.pdf
    • http://rubensova16.cz/files/file/kabaxolif.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dad5.bin
7d39268eb1e3d84bfd01879d34a87c8d036ce788942948db618d79e2c303ccb6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD5 17800 bytes
font_01_sfnt_off000108e2.bin
da0bc562c3512b4dbfb94d515590e0eda61dc3ddf7a3fa699a5fc0d86f1af0d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x108E2 10840 bytes
font_02_sfnt_off00012207.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12207 16792 bytes