Malicious PDF — malware analysis report

Static analysis result for SHA-256 277d89ae917358f0…

MALICIOUS

PDF

84.0 KB Created: 2021-09-08 05:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8d1ed1bd85adc3e7521dc63ba97566ed SHA-1: 12ed518eff8d6a39fbc259dd3a277f2da7c788e7 SHA-256: 277d89ae917358f048d2f749dc2cf2bfd0b2fc7b2f1c0751c9b17e8ebc875c2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs and links to potentially compromised websites, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate that the PDF is likely intended to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://archism.ru/uplcv?utm_term=bcom+1st+year+books+pdf+in+gujarati+medium PDF link annotation
    • http://secretinvitation.net/images/files/mamowetetoxidodavef.pdfIn PDF document text
    • https://aneri12.eu/res/file/tusurajimugujuregovenajex.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082086b8511b---paneguvi.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/64559145769.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/10747092921.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/wejawajuroxogazuri.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/4111358524.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a32f3e6f546---87758158762.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/621be348b175f179de7184499eacefc7/juvoliwipipojusasubovuluz.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/nejazevo.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120beb573528.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac153536ad2---43323472876.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/30615112911.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/2021921430106587.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/gotopu.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210908090445.pdfIn PDF document text
    • https://koparieshorvathbusz.hu/files/file/joxobeziwilada.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/b924fde739b67728ac08834a3de2339e/xibafitugitatedenegomupe.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/91401b49f23d9575e59992dcfb5a5d34/buzowux.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/46403560263.pdfIn PDF document text
    • http://jhroseclassof77.com/clients/45984/File/84863783725.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/sixabazuvixaxilamof.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/88f9e37500ef5fcd78f017fe63bbbfb5/perevofafumipofalam.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/0cdd499dfacb1295f865da002606ac88/jitorobiwes.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/mepafekugejigap.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_off0000d9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E3 19812 bytes
SHA-256: 84f4fd74f205de4cf58ba2118de3587bffd2068d8ae5a32aeac22adc3610e042
font_01_sfnt_off00010eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB8 11596 bytes
SHA-256: 2d7b86df528f23918f0df09bbab829dad6267ac43202d28ec80f4777434406b4
font_02_sfnt_off000129f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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