Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1b5cd8c3b0ea47…

MALICIOUS

PDF

83.9 KB Created: 2021-09-20 00:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 05e8e2040259ab339e06b099702a2e33 SHA-1: 8a3756e0886989e57d8753cca5613b2ffe38c4fd SHA-256: fa1b5cd8c3b0ea478b46476de660e1e62dda0c2f1e0086420301631f8b7ef19f
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a lure, presenting itself as a download for a game, but directs users to external URLs that host password-protected archives. This technique is commonly used to bypass security scanners by encrypting the actual malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=gta+5+zip+file+download+for+android+ppsspp PDF link annotation
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f0c1836ce7ce0fcf4e3159220ea496f8/mipezami.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/33152143333.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16142d048252cf---51240502633.pdfIn PDF document text
    • http://adhunikjewellers.com/ckfinder/userfiles/files/31302428488.pdfIn PDF document text
    • http://sinsg.com/files/fckeditor/file/60987800112.pdfIn PDF document text
    • https://inprovitparaguay.com/ckfinder/userfiles/files/88688077132.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/11386331713.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/72608402930.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/8116913341.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210918040907.pdfIn PDF document text
    • http://poultech.net/d/files/ritafakena.pdfIn PDF document text
    • http://diennuocdanang.com/uploads/image/files/rewibekukidot.pdfIn PDF document text
    • http://caycanh.vn/images/fck/file/rawejon.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/81021713298.pdfIn PDF document text
    • http://parkingparts.com/Upfiles/file/82306491085.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613adac887ba1---67384362769.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/futivizukikikez.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/sivomijejugefeda.pdfIn PDF document text
    • http://natalieshuff.com/uploads/file/sowonisusuwonari.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/muvejarakalavesagijo.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac7fe2aebc---dasezugaxakunugejiwo.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/pafoban.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/kolatutokena.pdfIn PDF document text
    • https://toscanafantastica.com/userfiles/file/zexebakumasurimatugazoli.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/zajet.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/73247157956.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_off0000e344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE344 17308 bytes
SHA-256: 920b708ced64aaa2dcbd9599d6651cd79d3bd1532d5f99d0b1a85b14c15d07af
font_01_sfnt_off00011072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11072 10812 bytes
SHA-256: 2555100f9ff95776f546921555b9ef31c9e1538373626fc7d5f45fa3d5e02d00
font_02_sfnt_off000129b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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