Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce5be7e1584177b…

MALICIOUS

PDF

93.3 KB Created: 2021-09-21 14:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: b06f48726b732a792347007352609b43 SHA-1: 18faeeed15bb59e7930ae826c9e94737c3eae41f SHA-256: fce5be7e1584177b0b053243e881d3d5cdd784559aa0a0bf676baafed790562e
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. Embedded JavaScript streams were also detected, which could be used to exploit vulnerabilities or download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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
  • 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.
  • 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://fobh.net/userfiles/files/wujutekusudizuzofab.pdf In PDF document text
    • https://htapigroup3.com/contents/files/54220343562.pdfIn PDF document text
    • http://jmk.kr/ckfinder/userfiles/files/vorojajasapasulek.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/jibofezuvot.pdfIn PDF document text
    • https://khoahoc.timviec365.com/picturesfiles/36118437072.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613895c87a9f4---ligonagexelele.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/3068227674.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/jasagurinuxuva.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/35618061643.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fd1988ebb---guxikijiwujo.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210903064437.pdfIn PDF document text
    • http://ans5680.preneed91.com/upload/files/bimefubinesu.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/36985818096.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/jaliwe.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/f713201404ce4660ea8e6be4fa5a21d3/5394359634.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/52393631541.pdfIn PDF document text
    • http://czyxchem.com/upload/files/30831168075.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/70822039726.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/54044769901.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/jenobezimapupujoge.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/rovir.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/tepemotusimuzememoxegonad.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/ponegemisivuzutotile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=gta+namaste+america+cheat+codesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 18400 bytes
SHA-256: 30569b0d3d666ec160813a7c066d454116168be9e937b8b805c42d4dd45c386a
font_01_sfnt_off00011d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D28 10628 bytes
SHA-256: 6bdb99b6eb768144044f3e11fee05f396411bd1203e604526023bbebd0da1d55
font_02_sfnt_off00013547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13547 17140 bytes
SHA-256: 45968dceb6c9e927d80d4820a5a284c4377c751aecfaf50ba5ab81e8306553c7
font_03_sfnt_off00014ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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