Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa1a12d84e279d3…

MALICIOUS

PDF

84.7 KB Created: 2021-09-19 05:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 22cec8c930678ed561e78e17a551f53d SHA-1: 320a75249c49309f5ea93d8f74c51b09ef004223 SHA-256: 0fa1a12d84e279d344f288e4bec4bc74aba63e65868b69c25db3d48ca54681b3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and is flagged by ML classifiers and ClamAV as malicious. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in tech-support scams and callback phishing. The embedded JavaScript likely facilitates the execution of malicious code or the download of additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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.
  • 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://beyondpins.com/calisma2/files/uploads/farixefuwiriselep.pdf In PDF document text
    • http://bwemfjhjk.friend-match.com/upload/files/24274225816.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/padivofomatimininabape.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/fumaxakod.pdfIn PDF document text
    • http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/87722430754.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/38344487478.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a81b18c538---mamojonovaxivenip.pdfIn PDF document text
    • http://hingliltd.com/userfiles/jedavefebamedudema.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jitevatafutere.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/zibofomilap.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210906110210.pdfIn PDF document text
    • http://chenruichem.com/upload/files/84870909327.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/pomazakewuguzuruporovubo.pdfIn PDF document text
    • http://decaiyun.com/upload/file/2109041908319450972vxxvjc2hy97.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/29245878901.pdfIn PDF document text
    • http://spitalmoldovanoua.ro/ckfinder/userfiles/files/govuzuzakotif.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/33988045173.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210909_1DD58C9897C26C5F.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/fuxapenufe.pdfIn PDF document text
    • http://saint-party.com/media/file/78764772177.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/9366564732.pdfIn PDF document text
    • https://vsevolozhsk.mebel18.com/uploads/files/26772376747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=hack+harry+potter+hogwarts+mystery+androidPDF 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_off0000e5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D5 17504 bytes
SHA-256: 7be9a64ed1e84a932e7b2ab61431860f44ea0cd21eb0317a05681ad218357d3f
font_01_sfnt_off000112fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B13 11200 bytes
SHA-256: d41584d3fbabb24d733e676453741cc90ed21e37315b2fb0f565e203f7a35848