Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffbd4b71e753a088…

MALICIOUS

PDF

83.6 KB Created: 2021-09-01 14:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e967f994fa190edcfeac8df969379f8c SHA-1: 89084e138bf03a7275f2fae75f77943230c8b52b SHA-256: ffbd4b71e753a088d4185fb611bc94cbf48f0d27423894983a076503ee0ae34a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to multiple compromised CMS upload directories and disposable hosting sites. These links likely serve as a distribution mechanism for further malicious content, possibly phishing pages or malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://denis-lefebvre-services.com/fichiers/file/96506763942.pdf In PDF document text
    • http://bona-agra.pl/Upload/file/wotubigovuxatumelakum.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/6638b6f7e6a191830d06abf86dbec651/7589750232.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3ad066ea0---kesefowijenajakiviko.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/mewibexalitovi.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/nejapavepajeza.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/90f3d07e42e252f94dd62ead921925f1/xonawamemugikini.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/75835059945.pdfIn PDF document text
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/41569574755.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/2500b5d836b90bc9ae2bb8f0cf1dd939/5934644725.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/46157241079.pdfIn PDF document text
    • https://anandalaya.in/resources/file/vuropoxoxakagu.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/6ffe1619b3f2e9e1ee2bff8c56e27503/47961741059.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fd078ee5e32---58801184377.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/tokifixabokusoxiguwodi.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/a2eddf09a7d732866dc3c81c31c56122/wukozudureparoto.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080446be7194---36367135483.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7ed9b4975---gesomatutibi.pdfIn PDF document text
    • https://starbox.fr/img/files/59868971283.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16087751548cdb---73378004504.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=apple+streusel+muffinsPDF 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_off0000e09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09E 18952 bytes
SHA-256: 0217b8d6f4c382616dfad95e0d0554caeefab975f947e49c2b49e01a96b4c871
font_01_sfnt_off000111f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0A 10320 bytes
SHA-256: b7c6e601e7834657776b6496811d5817e94a5e882316497edd8fe4cda18ceb92

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