Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed54ae57365efc6…

MALICIOUS

PDF

81.5 KB Created: 2021-09-12 01:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 7bb5f80eefd866e4ff9e12710d744b10 SHA-1: d5061eb5313448e69fb12a1321e004afa8d2c8d1 SHA-256: 4ed54ae57365efc6b9752df5a552a6455c212714b8c6879e78b5c59beeb870d2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous embedded URLs pointing to various domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a deceptive structure for distributing malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://philabc.ru/uplcv?utm_term=life+as+a+house+watch+online PDF link annotation
    • http://macro-e.com/app/webroot/userfiles/files/5237336972.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/xezufimaraled.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613294087a46b---29040534291.pdfIn PDF document text
    • http://mmsmarin.com/imgimage/file/80277710928.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/92136573463.pdfIn PDF document text
    • http://masonhn.com/d/files/bunofobe.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210904_224522_8339.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/gomagovowit.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/28402782913.pdfIn PDF document text
    • https://yifff.se/userfiles/file/lorubabebamirogiroduwidul.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/lafanorujodibovukag.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/34359739584.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210907_CDADF7327DE58BC4.pdfIn PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/toripojugegevikusulomej.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/zujubidinobulugemodekupu.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613d184d34097---zetupetikikezitubebijug.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/nunolu.pdfIn PDF document text
    • http://bergepkolcsonzo.hu/userfiles/file/61818477840.pdfIn PDF document text
    • https://12shio1.com/contents/files/66719374198.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/wovuzofepubofidekunaxex.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/baxuwejutepugusibivavin.pdfIn PDF document text
    • http://tranhdaquydep.vn/upload/files/kewapewu.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/lipobevemofaxelokez.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_off0000dbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBE 17232 bytes
SHA-256: fcccbfa82a786382baadcea8e7550bc38c3ea4f2eeff5ec4e961d8c46f100604
font_01_sfnt_off0001086c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086C 10476 bytes
SHA-256: 751f17dadce871671363c7f5a02f61a5ee9f7453686e8004c019693cc8d21a41
font_02_sfnt_off0001203f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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