Malicious PDF — malware analysis report

Static analysis result for SHA-256 7939ae5cbfa28637…

MALICIOUS

PDF

84.7 KB Created: 2021-09-17 00:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fe97fae66763b536b143ee273701c432 SHA-1: 693f3795a5d1cc97a1651496a3b748418cd0840f SHA-256: 7939ae5cbfa2863788b979cc16ece620d9d82f683eac49e87e48c23c0b63ea76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a tactic to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

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://oniceh.ru/uplcv?utm_term=best+phone+under+10k+in+bd PDF link annotation
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ee219ea09---1108852561.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/68163057902.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/dalixibuzolepuxutitesome.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/wuwosonotuviwoxekiv.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/75737705236.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/zasegepojapewibenomaxine.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/joxuxajukutozifo.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/botonewerosaz.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7cb37fa0c---10516151395.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/50343265884.pdfIn PDF document text
    • http://vandofigueiredo.com/userfiles/file///45080351138.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/kuwupiwix.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/tevomazosi.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/nopisutugumovazupo.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132f960abb06---48434563796.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/80604018983.pdfIn PDF document text
    • http://dxline.eu/userfiles/file/52195565940.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/nifovusotanuduj.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/jajorewekuxabepodo.pdfIn PDF document text
    • https://farsiherbal.com/cache/fck_files/file/dutuvewogobujuwogunudus.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/zosenodakotavolexavaza.pdfIn PDF document text
    • http://disonde.com/filespath/files/20210914083403.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/dikasezironubo.pdfIn PDF document text
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/gazaziloliwisazekodudupuf.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_off0000e67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67B 10840 bytes
SHA-256: e6065714d3e9468206824d41bfb83828cb306d8cff582847705c8d35f759ce72
font_01_sfnt_off0000ff3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 17800 bytes
SHA-256: 585fc5273b4c81f45b0cd03249e353abe03b17ccdf7b650a0aef9b3c171e08b2
font_02_sfnt_off00012d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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