Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec0621177576b274…

MALICIOUS

PDF

75.5 KB Created: 2021-10-01 11:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0c5fe8414d400346c350cf29bdc9e4ba SHA-1: 9c9bc4a3f8dee9cd95d1e4bc646b11545a3a6982 SHA-256: ec0621177576b274c9f75ce6211cb66d51c0be011c1c65862049a73fc7540d22
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded JavaScript stream and numerous URLs, many of which point to compromised WordPress sites acting as a link farm. The presence of JavaScript suggests an attempt to execute malicious code, likely to redirect the user to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145b61b0490a---69271501307.pdf In PDF document text
    • http://pomelieagency.com/userfiles/files/zolutizidozeboxarabofekis.pdfIn PDF document text
    • http://heatherjansch.com/ckfinder/userfiles/files/javulanelukivamusobiwo.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/vamolen.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/41908476343.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/zikalep.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152f644101cf---kofilizi.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/71198003080.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/fhqms60ftjca2mleh52bi3ffbl/zatelisaberalatatejup.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/karirovebelim.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/goxisajakaserafevuzatew.pdfIn PDF document text
    • http://dienlanhhuubinh.com/upload/files/purapuwokevoje.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614badd3cc03c---vobowatakelutokot.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/qjfoaeomnacm1vb6b7jl5uq6uo/73561492849.pdfIn PDF document text
    • https://gjbuyerbroker.com/userfiles/file/12857749106.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/62913113546.pdfIn PDF document text
    • http://rancholasmonturaspremios.com/campannas/file/jifalelenaxi.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f8e3623889---bitovoruzikukemosom.pdfIn PDF document text
    • http://jd6618.com/jd6618/file/2021-9/file/LwpCms2021_09_07_06_30_12_1879.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/ripifotigujijorolusevi.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/vewufawimamimexij.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/dawusukilalirapifa.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/kekujogizob.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/tilarufitanutivuzogaleg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=view+instagram+profile+picture+onlinePDF 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_off0000bfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD1 10976 bytes
SHA-256: 0ab0cb58de1c6460573d358583a05ee872818851e0a0e95196a2731aa3bd7a7c
font_01_sfnt_off0000d969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD969 18384 bytes
SHA-256: 1288ce7d599c37ffcf987058cac0521fb815787d2360a142564a348838bb7c9b
font_02_sfnt_off00010855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10855 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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