Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa222c40f2d505c…

MALICIOUS

PDF

81.0 KB Created: 2021-08-19 06:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e2f39ef72dcff47ed745b170dd41c41a SHA-1: 1621c9c055ef726ead4c9f2d7e8c7aa76c38ec4e SHA-256: 2aa222c40f2d505cfd3527672409d84ff3f0ae69a472db15a0a419ba0c227242
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it's used to redirect users to malicious sites. No scripts were extracted, but the presence of numerous external links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://botosani.ro/img/uploads/file/95343274850.pdf In PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/wifizo.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/2213f5dd60711c6152e440e51d9ce105/besubetesad.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/66749774489.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/87356284656.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/70482350972.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606eab23793e0---tijajin.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/99235402890.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/7640859865.pdfIn PDF document text
    • https://trongtrucsolution.com/uploads/files/fokuvigosazujirepasali.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf59c3eb933---75767927795.pdfIn PDF document text
    • http://japanbizkorea.com/userData/ebizro_board/file/4411109455.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/41069396255.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5889d007d1---48802690405.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084ae445b584---54436069022.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087c3c11ab03---49949354807.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/05af677cbbd9d15634e7ebf4c032b33a/vavijurujozin.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/72464613895.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/a87f27fa01fcc14f75d4dd644eabcb06/zixibatakidil.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/sifozomivimojijure.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6b0ed58070---53158083335.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/relupika.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/regakogoraroluligawu.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/jumupirulawazuriweteposi.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdd45377c6---budekikikipemud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=numeros+pares+e+impares+2+primaria+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_off0000d5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC4 18160 bytes
SHA-256: 4376bcf97f7818c126c680bd9b81b0747be1edefa4ed941172587717ced920e7
font_02_sfnt_off00011b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B85 10608 bytes
SHA-256: 49dde85077e0109a77af8edcd5004ffbc0d4b0e6ad96d1071a3d8836d23a9df6