Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc95113c98de2e4…

MALICIOUS

PDF

68.1 KB Created: 2021-10-08 04:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7c554c4bc97ee13ba4ed9a3cdecb308d SHA-1: b641ebc80fb95f7b7677b543c06b4a497dcc774f SHA-256: 6fc95113c98de2e439507c31b4624428fd87605f226581a0d08f9eeddc4d03f5
146 Risk Score

Malware Insights

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

The PDF exhibits characteristics of a phishing lure, being image-heavy with a clickable action to launch an external URI. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as Pdf.Phishing.Trojan. No scripts were extracted, but the structure and heuristics strongly suggest a malicious intent to redirect the user to potentially harmful content or initiate a download.

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://rld-carbon.ru/file/82474451447.pdf In PDF document text
    • https://ivanamihic.com/files/vadifitalizutajozagotuz.pdfIn PDF document text
    • https://vizesblokk.hu/files/file/lumali.pdfIn PDF document text
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/zomonumukufu.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/20467074259.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/89722090310.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/pazefolopojomikerasojuxur.pdfIn PDF document text
    • http://gartenbaukoeln.de/uploads/files/30870560514.pdfIn PDF document text
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/witeminamun.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/24567498550.pdfIn PDF document text
    • http://lysfyyy.com/upload/files/dolopagusotokuxoban.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613bea6d97655---bokefijexuri.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/43707516544.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614e0706461d2---72678195897.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/punegelesijipakenol.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/5980555175.pdfIn PDF document text
    • https://tepihtrava.rs/files/92791010609.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/favixisuzexilupon.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/gegasokosepawivimi.pdfIn PDF document text
    • https://gemwares.iceleajewel.com/userfiles/file/gerurexid.pdfIn PDF document text
    • http://kingkady.cn/uploadfile/files/kixosuxigokamarekizeked.pdfIn PDF document text
    • http://austria-ex.com/images/blog/file/83915089211.pdfIn PDF document text
    • http://evrokomplekt.ru/userfiles/file/5805638036.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/68978109512.pdfIn PDF document text
    • http://xn--z92bzy85x.com/userData/board/file/83951041541.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=experimental+lung+researchPDF 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_off0000b001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB001 13832 bytes
SHA-256: 31271be88962e90838330f94cf623f3de8ac115bde796cd9614e8beeb0400a35
font_01_sfnt_off0000d1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B4 10888 bytes
SHA-256: 7660f4a0605c3a3669bd63fa709f1071a803037c3a4f5459f06d8840268b1353
font_02_sfnt_off0000eaaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1