Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b30e694d09dadc…

MALICIOUS

PDF

80.6 KB Created: 2021-06-30 22:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ccc8c8ea827bb250d771cb0db022ea55 SHA-1: 1bccd7c9aafe8886c9fca20380525e1c620f4891 SHA-256: 09b30e694d09dadca0cd34da41a90c17219acdbd6e7235e71dd562504a759620
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be hosted on compromised WordPress installations or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, but the structure suggests a link farm designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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=bring+sally+up+video
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16083e3f723692---badimo.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/18e51e2c05a7e1df8340db19cb31cbcb/sazatedu.pdf
    • http://insidethedigitaltrend.biz/userfiles/file/gizuxebilojinejizexivu.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/fd11a9942388a920fe6e81f1e21350de/tadegurewolili.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d061aaf25c5---vipusukunezesijepu.pdf
    • http://thingsantiquesla.com/userfiles/files/21594987204.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c0166bf38ea---5494007600.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd1d79151d---83128099640.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cdcf922da---74864061375.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/013b065bd23e64ec97cfe5334c8f6a19/69674780512.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/1705f67ba4ac1240db928bb12aed3ee1/tabun.pdf
    • http://28777886.com/Lpf/UPFILE/userfiles/files/fijakol.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bae6226ecb---93687311711.pdf
    • https://guclupin.com/calisma2/files/uploads/kajupuwenubanus.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/8e5f51c957463f30d59021e6d79fe8df/26906865604.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160882354c51f7---38858676083.pdf
    • http://kusadasidentalclinic.com/img/userfiles/files/falukiwunidafonivopatomub.pdf
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085ee92bb76d---pidiriwanuxipuzapivejila.pdf
    • http://i-dron.cz/data/file/40108827956.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/ki2pf4l7kl9fb06t4pkbisdsnu/9141258166.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/snvjhu0f7bqgfjdnhvbd1sigk4/fejokakoj.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8897c2870---parexakawovetevo.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609d17b893148---fujavojefa.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/282ec323a1a7c6cf38e67d4e61ee7281/xajagodugovazukuko.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/gnpr32jfqcvtn95096q9090nh7/69328072708.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d76f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD76F 16792 bytes
font_01_sfnt_off0000ef81.bin
f1da885f6695a822ee0a2edc7d98edb70840cf41648a253040afb50ba0c94ddb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF81 17124 bytes
font_02_sfnt_off00011c20.bin
0d83d8f7d8a87503e6cc5eed47f6ebc52cd674dd1a0bf9bdf922f042cb1ea4ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C20 10800 bytes