Malicious PDF — malware analysis report

Static analysis result for SHA-256 7170f7326e672e9a…

MALICIOUS

PDF

71.4 KB Created: 2021-09-15 14:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 674ac6babdf5338cdc08266c383259fe SHA-1: 2cd7b344fa2cc98134745e364fc0a40f9e74cd41 SHA-256: 7170f7326e672e9a5f71ebb6f6d127f1f716f83f9f677aa226250db3e72ed2d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, directing users to numerous compromised or disposable domains, one of which is a WordPress upload storage. The presence of external URIs and link farm characteristics suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://coretry.ru/uplcv?utm_term=justice+league+animated+series+streaming PDF link annotation
    • http://nbc.com.vn/ckfinder/userfiles/files/dotokufomotibiko.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/goxumexarukasodirezuxur.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/27304644112.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/21355823325.pdfIn PDF document text
    • https://semot.com/Store/userfiles/file/26133989749.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/278c93689cc2c17209e7b0724eacad84/86482380065.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210911000508_3c66oo.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16130dd25cbc86---99002201881.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/16806428817.pdfIn PDF document text
    • http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/131401278632.pdfIn PDF document text
    • http://dges.in/userfiles/file/nofonefilakiwulaku.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/4322757550.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/kenidudopijox.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161361bc0d7b2d---wepajaxokivomerofasado.pdfIn PDF document text
    • http://snft.ro/media/file/27130822839.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/fikonugurixofegapaxelorum.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e7ca494a4---fijopa.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/lemolezoxebe.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/57062590465.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/4hobtp09o39d5i0ib6ref2h817/49078570375.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1614160e0a33fc---19946872043.pdfIn PDF document text
    • https://norservis.info/files/files/pefimutufebitupi.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/gikigeletemupuwukelex.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_off0000b6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ceb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB9 10684 bytes
SHA-256: 1f891f13992d01fcc5bd3cc18393cac5561165dadfd9938e30f6ad9ec1331446
font_02_sfnt_off0000e700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE700 15876 bytes
SHA-256: db4d37af838705703a91aeae53dda5c5df4c9c8a07235cf0d4cb91bf380fb495

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