Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbd4522836033cb…

MALICIOUS

PDF

231.5 KB Created: 2021-07-22 01:34:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 60a6e8488a44be04b1916a8ed1dd7f32 SHA-1: 52840a6839a8222c1b9676bb29929810bc8421b2 SHA-256: ebbd4522836033cb86ff01c9f1337169658f4054e237f8c0d8adeab696dcc65e
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document exhibits multiple high-severity heuristics indicating malicious intent, including ML classification and ClamAV detection as a phishing trojan. The document employs a browser extension/update installation lure, a common social-engineering tactic to trick users into downloading malware or revealing credentials. It also contains links to potentially compromised WordPress upload storage and SEO redirectors, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of embedded URLs and the overall heuristic profile strongly suggest a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9315

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://mttrasportisrl.it/dati/upload/file/20629348161.pdf In PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/q6hbi64r6vamg7k2m3hgk4cjfq/tuziripolurefidi.pdfIn PDF document text
    • http://beateromer.com/bilder/file/kexebokujidagoja.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/pugubaril.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/80e62c9a7536f9d3b5fa028b9200a600/12891594084.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/2qd3q44rnsasjgsuihii821eib/87330276299.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/02c685a3e3c212eb8f8a010674edef30/fadisototab.pdfIn PDF document text
    • https://phr4u.com/files/volozuwibosozisuvu.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0421ab706---fidigituwaxax.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202106202241301055.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16088ab053a770---41953159611.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/dobotosa.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/lajugaxagi.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd9e73c594---88977866306.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/47949223734.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608549bfcb097---ripagoseserupefowudo.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607156bba927e---36590422315.pdfIn PDF document text
    • https://o-dance.com/upload/files/gakexumevegatodupe.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/10001915383.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/xutijex.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/armf1app3mdmaeg0g95md9kc44/64952109375.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210715171204921.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2467e849e---3384631062.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=oracle+payables+user+guide+r12PDF 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_off00032df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00034603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34603 17848 bytes
SHA-256: cd9b6733f083399d2b0dc234ecc52602daeaeaa95d9894438ded3b08d0c45265
font_02_sfnt_off00037518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37518 10920 bytes
SHA-256: 158862eeb1b941e1ed16b7ebe2b0ff5875888203fad83b48249c65100017941c

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