Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7455463d7f253cc…

MALICIOUS

PDF

87.9 KB Created: 2021-07-19 00:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ca0f6e1a9c5bde4c3ad13d5f83d762c4 SHA-1: 4ce5815d7d1143f03f41ad839c48615a62ce50d7 SHA-256: e7455463d7f253cc2189663c90960f6de8237d420c7f8502bd1f859202a451ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload storage, suggesting it functions as a link farm to distribute further malicious content. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795a0d1ccca---riwozizinivubajevem.pdf In PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/fonelitaxubipapuxeniwas.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/54572107523.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16093a73d134d0---wolorovoji.pdfIn PDF document text
    • http://abpaluso.com/upload/file/gibeja.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/24sl4egik68gre16a8dnjfqpc5/5263468307.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/4b0db9fa35110255a39b8c0a19662376/vorilelusaxipejunag.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/70713601746.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/sonajizesiwogexoroxolina.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/eb63697caeed6c37871bd879d657ffe8/puxigovuwaf.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210609172733268.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16097a517e1b30---rusadezigulubawoz.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/cmqnoedfedhljbqr7hqibvpkg0/nogis.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3947ef85d---gokoxikuve.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/295d7f6a9459588fc0bfb2a9feecebb9/fawubefegoji.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/cf533eff13d0241ba8062aa24d68423e/pafibizirivazege.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/68032032c5fa0009b39abf4a601aef88/25945565805.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/48026739792.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609658b574edb---72707447731.pdfIn PDF document text
    • http://hydrem.ru/images/file/sekuwenonunenufaf.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/tomumodekelosatadapovaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+turkey+vulturePDF 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_off0000f5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E8 9896 bytes
SHA-256: 4d8006ac9b12f88d1af52a5aea35e4b33a88b17b0ce6afbe58de8c031c1c83dc
font_01_sfnt_off00010be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE7 17532 bytes
SHA-256: c41b71345111edc0400fdcbdccedeca5c5a681d683fef0cbc285419bbda07503
font_02_sfnt_off0001398d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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