Malicious PDF — malware analysis report

Static analysis result for SHA-256 982a7e73fb3d0f53…

MALICIOUS

PDF

98.7 KB Created: 2021-07-15 15:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c48feea6566fbeeaf5cfe0ece0546b1d SHA-1: 004cc5ca240142758d28dc82237378bc2530f474 SHA-256: 982a7e73fb3d0f53b30939e82c31c19d5111dcc04d3790e530f07ac3e85fefe2
196 Risk Score

Malware Insights

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

The sample is a PDF document that exhibits characteristics of a phishing lure, as indicated by the 'SE_REMOTE_SUPPORT_LURE' heuristic and numerous embedded URLs pointing to potentially compromised websites. The ML classifier and ClamAV detection strongly suggest malicious intent. The document likely aims to trick the user into interacting with a remote support tool or downloading further malicious content from the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://synerhu.ru/uplcv?utm_term=standard+deductions+for+2019 PDF link annotation
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76861028457.pdfIn PDF document text
    • https://luminex.pl/upload/file/beketukesadas.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/30438675667.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ef3a9b916---48930524198.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/20438956388.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/htp45d6q9ee5tv62qogk2m8l72/relunevelasonatuf.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/dopaxuroze.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cfd479ed7---19872262888.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/69147422419.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/xigepewefupe.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/gofub.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160d86322a5082---3029974526.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/82312490682.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b83fad067bb---14807029622.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/51650065412.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/sabififiweletorix.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/1191dca06db78b9b04dd3dde52257aa7/femarowovabenarip.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/llg4qr891rjkuif2sdnehv4d27/fonevadasetagujivagizego.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/sozumukoketenavomusewetiz.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771f98f14e7---rebuxixokekasupawegujune.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a39c395f21b---rakisakigitirom.pdfIn PDF document text
    • http://smakbyala.com/ckfinder/userfiles/files/85076750973.pdfIn PDF document text
    • http://redactron.com/userfiles/file/ligojikipixowature.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_off00011d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D70 11060 bytes
SHA-256: 1c1def4f77024529d04a4d7f05af2bcd7786a50f7dfd0d54d51a4727f27a5426
font_01_sfnt_off00013762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13762 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F74 17104 bytes
SHA-256: 1decd595bc0b997f66612de66ea45caa9d8566d5fe015982af0282da49439b17

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