Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54d6c6bd3b2ac2e…

MALICIOUS

PDF

80.7 KB Created: 2021-09-09 08:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 49ccc29103117ef489e983857454a8ab SHA-1: d71ad16840f2fc76296dbcc779946787f620376d SHA-256: f54d6c6bd3b2ac2ec55b5da8746f7a09a3d44bcd8052067fabf6287dd2b676bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these URLs and the overall detection indicate an attempt to deliver a malicious payload or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=toolwiz+photos+app PDF link annotation
    • http://naturestuff.nl/siteimages/file/72145335879.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/16577688956.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/28217860802.pdfIn PDF document text
    • http://espicycooking.com/files/file///45694062173.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/68451486500.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/xepebo.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/8203772364.pdfIn PDF document text
    • http://2013.letnifestiwal.pl/ckfinder/userfiles/files/pojug.pdfIn PDF document text
    • http://nurugelexport.com/ckfinder/userfiles/files/nufopopisat.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/59931504576.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/lutanedixewefijat.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/12057857071.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-9/20210909095442450930.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/mowenitot.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/wonawivotani.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/15373298157.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/sikakemevegepegaj.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/34841472133.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/bixovopegupiwomij.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132869f21798---23163983421.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16132cc6a9813c---78269269030.pdfIn PDF document text
    • https://ooobelkom.ru/ckfinder/userfiles/files/51193937486.pdfIn PDF document text
    • https://livres-arts.com/ckfinder/userfiles/files/85512031011.pdfIn PDF document text
    • http://kammed.com/userfiles/file/31045494865.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/f103df45aa9d89461162c2d4c783bbec/31746704295.pdfIn PDF document text
    • http://www.pilartangguh.com/file/ralebewabujodomijoboluxa.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_off0000db66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF378 16396 bytes
SHA-256: a696c83f1cd0cdee28e9b61b2e4d2b1b58b54450fbc80cb6cc2144609d000c3d
font_02_sfnt_off00011df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF8 10120 bytes
SHA-256: 21c6442586abec59398e048231e6e9f4851c221d777c26f83c0a50a78e1e3b3c

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