Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6f57de607058a1…

MALICIOUS

PDF

84.8 KB Created: 2021-07-18 00:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 92264cca10f4ae6090e696e2b3445ec4 SHA-1: 98f6a0f2c03a8a948bdad915ffbd38ffe403255a SHA-256: 8f6f57de607058a1a2f6b03b9bdb20ae91deb3764a42507ba1906c0e1b97cddb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a978443fbcb---zusajasuwaxola.pdf In PDF document text
    • http://csc010.com/userfiles/file/20210618072136_2h2trw.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/lavuwolaguzes.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/f11ea2228baf0d61f78eee0fcf4b6699/xapap.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/negiwejuv.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/zapejexesuraxeze.pdfIn PDF document text
    • http://aldercrest.com/files/39429623382.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/22448139067.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/resuf.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/fb4e66a3c1dd5e132486448059db2ac9/tabuguxaku.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c65af80ab9---91933582588.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/42995f8754fa470e764fe237a0eaece1/3882645505.pdfIn PDF document text
    • http://ontsgoi.shop/uploads/files/27291219361.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bcef166ad6b---nilasotagegiganotelu.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/78226254499.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/6c2872850ba6012fd43fa8e1b49d456d/52413865473.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b555bf8a2c1---35612787430.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/6pq2vojknif9b592h9dri3ife6/lojaziwagafotoka.pdfIn PDF document text
    • http://ipublicity.cz/data/file/99649763517.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/u40m178c7vcfogr9dnu6cuhevg/94516393122.pdfIn PDF document text
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/24014028662.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/kkg8ulhgr82v1rr6m1fjhto0e1/78748643260.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=it%27s+so+good+to+be+back+home+againPDF 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_off0000e777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 16868 bytes
SHA-256: 0aad684b59e6222e973f7228163faed0f9541edfe71c119bc77e0bc3b4fb191c
font_02_sfnt_off00012bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB9 10888 bytes
SHA-256: 55f74677894098684f0c30bc51bea0eed7772fc8e960bb8772abb0ff7cabba10

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