Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa17852b3d4e288…

MALICIOUS

PDF

68.0 KB Created: 2021-09-27 16:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 83ad357457b239a54fb8f6e3dd170977 SHA-1: 39be4dac09cfe1d55dc3ccd7cadbf9370de49f16 SHA-256: dfa17852b3d4e28854f44b639f6f831934eea863361d1a9fcd3c3909b7311ec0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous external URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or download further payloads. The document's structure, being image-heavy with minimal text, is typical for a screenshot lure designed to trick users into clicking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 8

  • 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-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://philabc.ru/uplcv?utm_term=chromecast+pink+screen+of+death PDF link annotation
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/161426e8f4f809---50158648786.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/63199084877.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/68110786415.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/71265407478.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/rakadotijajaxeva.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109212023158367.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/62993382383.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/89999264608.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/wasepuvo.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cff3206cd5---japotiluven.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0298cfb4d25f3ad51a52f5f7f363ed70/zunudinamefajedobokogo.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614ed3246dbf6---80818309078.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/5163240962.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/67531620032.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/09lk9peicm4nrun8th3924bus5/27601426012.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/75442941333.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6c128be2f---10514199318.pdfIn PDF document text
    • https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/63556779994.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146a6edcf631---45562144346.pdfIn PDF document text
    • http://96rangjai.com/userfiles/file/86920029115.pdfIn PDF document text
    • https://cian.hr/userfiles/file/34228149763.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/54641491524.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rojilirar.pdfIn PDF document text
    • 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_off0000af55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC767 13640 bytes
SHA-256: 280418a226354c5f96cc5f0c2bf83da46204a7d0ab845c47dbfb040874945ee3
font_02_sfnt_off0000e927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE927 10964 bytes
SHA-256: d2828e62ad4cf3d2aee63261b50e4c7e5f7ce93192cd747db4b77a5298235cff