Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e514e2bedbbb07…

MALICIOUS

PDF

83.2 KB Created: 2021-09-08 10:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 71e06ab5fc26adb693ab1a24b2cd1db0 SHA-1: 4353df815c2e4c2bd747f9befdfe01449b896fb7 SHA-256: 57e514e2bedbbb07717ffaf3ecaad230467c2030bd13b383de5814dd7b16a6f1
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated high maliciousness. Heuristics identified it as a link farm pointing to numerous distinct hosts, many of which are hosted on compromised CMS upload storage or disposable domains. The embedded URLs suggest a phishing or malware distribution attempt, likely aiming to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://bestpokeya.com/uploads/files/86941659895.pdf In PDF document text
    • http://ipmarketing.net/userfiles/file/vavonarabi.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/fd8426ebb8b6f1a36eec9a4cab00110b/zitufevatoduwubon.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/9e561cfb0f9386f5c55ea4064385e35a/subavolazabexasimikezubut.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/9hrnmn6svomfebrap41t5ohbm3/diruburozufad.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/91275220446.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/ef5e4f5b63b5eec8252c4aa2fb8055c3/falik.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/0c4dd01cf3bb96ea509716f0479688fe/sozevexije.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3dd5727d27---timise.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/kijalefupovitezuzivoviv.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/ac09f34c60234fed16405abf4e3048e6/bekepowaxidiregemusurevu.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/latibovapewomugu.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084913589f78---keramoviweteratesuvefufi.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/c6b60a30e6f19a3eee475d0a52afa8f4/marefomasaropewivam.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/44721651663.pdfIn PDF document text
    • http://cosyromania.com/media/file/96787510310.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/vsatutvmeg5jlqg2mk9cghda21/64268882529.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/81d3893b80a446c1060714642a2a8a8e/50340584298.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/rosolunumijiduxojefij.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/736c59e69fbf60c424c027eaf390ee33/38925771480.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160afb0919915f---rudola.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/kagugiwokuzuzotirasifed.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/sodipirarepanojatap.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/53124966928.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=induction+melting+furnace+design+pdfPDF 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_off0000dfe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE1 17912 bytes
SHA-256: e474294d54d680ea8ebc60a75092885975997ea109f80124d8b90485a7e245f0
font_01_sfnt_off00010df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12609 11012 bytes
SHA-256: cbafb306673bab752354b3c12380cc36b08fc8cf9dd96599aa0a44fd7008b794