Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a46310ce14e8482…

MALICIOUS

PDF

81.3 KB Created: 2021-09-07 20:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 192839dec8944b91b7449352fffb67e6 SHA-1: 5d1da4a90737ef122466ec1d92081126bc6b4444 SHA-256: 3a46310ce14e8482676f5b0fe59743a6fa628e48334d02eeb60adb30fcf2e0b5
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to lure users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://eetravel.net/file/dobukudikulogixajotidiru.pdf In PDF document text
    • http://inse.us/uploads/images//files/pewewisofisuropogajufesad.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e17255f58d---pakufi.pdfIn PDF document text
    • http://www.siposferenc.hu/html/tutafiwinu.pdfIn PDF document text
    • http://usagimatur.com/files/others/pijonumebolavom.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/64657801761.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/panigobajivitidemilononu.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/09aae0df35df7a50bb20a646ed89c8e7/pifonijolelet.pdfIn PDF document text
    • http://nifaelectronics.com/userfiles/file/bazunuzodazesotagaz.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210516/file/tirum.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/19136760766094062f71f95.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/zizowelaxevixumaxowobusav.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/30603610511.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/taxopomij.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/92319785505.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161147c5898d5d---daloxixatinopalupirobiwe.pdfIn PDF document text
    • https://tjpapigroup3.com/contents//files/jabene.pdfIn PDF document text
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/66872874071.pdfIn PDF document text
    • http://stonebriarranch.com/clients/876969/File/277439966.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608222f3850e3---ridurozunisi.pdfIn PDF document text
    • http://deckdreams.com/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/56226776091.pdfIn PDF document text
    • http://fkhd.cz/data/img/nilijopabupotaredunolewe.pdfIn PDF document text
    • http://teraval.cz/res/file/jexavasamebapozizur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=human+anatomy+for+artists+goldfinger+pdfPDF 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_off0000d994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD994 11044 bytes
SHA-256: 49725ebd569acf9536527390e7e90ab1d7925a177082363e39c7ee603812e6dc
font_01_sfnt_off0000f310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF310 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 16968 bytes
SHA-256: d9fe1fcb3e2bf8bfbf3446d806e10976737f0c29762697e0312fd0311fba05c4

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