Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9d19dbb18768a1…

MALICIOUS

PDF

110.2 KB Created: 2021-09-20 12:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 804ddbd4f23b717c4dfc7e992f11851e SHA-1: 55b8ef7db82dccc5dd73cf7e9c8d42ac9e7306eb SHA-256: eb9d19dbb18768a1cb52864540beea63a5c8c5cc78b79362050833865c8722a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents attempting to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://oniceh.ru/uplcv?utm_term=android+2014+version PDF link annotation
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/47527312045.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614028b2dcaa3---98341247330.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/91077852522.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/futunukivuzenifefimikun.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/81917012203.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/jarizewaruvumun.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/92246451343.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/43541570775.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/61611688347.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/41128397388.pdfIn PDF document text
    • http://alde-pace.org/ckfinder/userfiles/files/wowazulasusorer.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/29951498711.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/52281550803.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/jinusibetosozavorumu.pdfIn PDF document text
    • http://pazarziraat.com/userfiles/file/96806212118.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/fidarunazomovejamene.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/24757827286.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/42111982847.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/webekigowimalemulem.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cmvq0na7tllguc1obugbpr7080/karelesabaraniperunuj.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/tarusuvakugojoninaxono.pdfIn PDF document text
    • http://cartopack.be/Images/file/gubuvuzefizugotokixox.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/siseselitajaligoti.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613146cb850a5---38864464514.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_off0001487b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1487B 19840 bytes
SHA-256: cd907cf4963f07c5d7bfb097545ea12416b3fc86b44b7f41dbab21a704191417
font_01_sfnt_off00017c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001942e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1942E 10352 bytes
SHA-256: 642e12c70ed7128b92462b51a491d86c74628ef271c63d00b46b6135736d22fb

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