Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c602df222a40e0…

MALICIOUS

PDF

71.0 KB Created: 2021-09-09 13:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 461cefdafd099db45ffe02532178c14e SHA-1: 6b83521bd0a748e075381d2efae94d5df2a8c360 SHA-256: f1c602df222a40e021e2ac35c75e9aa1affc3c147607504829fa42e9cc17d07e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were directly extracted, the presence of external URIs and the overall structure strongly suggest an attempt to exploit user interaction via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=how+to+switch+off+notifications+on+android PDF link annotation
    • http://portableandcool.com/files/files/lalivusi.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1612f351a56ba4---potifasadagofugizexovez.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/8ab2f43a3d962825e4e08b8c64340ed4/jinigosaves.pdfIn PDF document text
    • http://all-paca.com/ckeditor/ckfinder/core/connector/php/uploads/files/nugaz.pdfIn PDF document text
    • https://taperagi.com/contents/files/44307511121.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/jenubukigavogisexowu.pdfIn PDF document text
    • http://flyingwedge.com/uploads/assets/file/37631180080.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/gagetifodizubejodavediji.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/9fc7af0f560bd22c76bce2605fd75e06/36765584328.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345e9bced7b---vozexedi.pdfIn PDF document text
    • http://e-sheremet.com/img/56493020845.pdfIn PDF document text
    • https://hoalavender.net/upload/files/vazabiribifilonororog.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/21053141675.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/jevupobanetuxasexigononoj.pdfIn PDF document text
    • http://pileki.com/imgup/file/zivugejenazopigeduvonive.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021932044535764.pdfIn PDF document text
    • https://linker.tw/files/10705676872.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/serozimupafitojewiva.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/namarufabapo.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/gaxoguzosof.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/dopupuwaxuxoxu.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/zavijijoneza.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2c8cc7940---zumenogobubezuzunovuz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d031981c6---62112399321.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/makuxo.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_off0000b76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB76D 15248 bytes
SHA-256: 11820ab35cd0db65cbd58360cca7ba6adcce8ec2e5024aad552c5b931b70000d
font_01_sfnt_off0000ddf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF2 10472 bytes
SHA-256: d830676228cf07efaba4f740e95d212b284bcceabe627c26dd321fc2f98b9198
font_02_sfnt_off0000f5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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