Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62a0dbf683f610f…

MALICIOUS

PDF

78.7 KB Created: 2021-09-12 01:34:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 976796cf1f096235202736c843d5989a SHA-1: 77ef1370778f990f30680cf4eac86a5c9ad394a4 SHA-256: f62a0dbf683f610f8a850cab321c4d5a14d8678d41ee6076cfba6173d924abfb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs and is flagged as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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 http://pijntherapie.be/uploads/files/getutevijabojabizibumoxe.pdf In PDF document text
    • https://soudurelausiere.ca/upload/editor/file/jumoforikara.pdfIn PDF document text
    • https://www.educationsexuelle-ecole.ch/ck/ckfinder/userfiles/files/49316299985.pdfIn PDF document text
    • https://sevenhillsgroup.net/ckfinder/userfiles/files/51824370699.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/vutolik.pdfIn PDF document text
    • http://wx-test.com/upload/ckimg/files/202109081647547623.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/vunit.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/44344471302.pdfIn PDF document text
    • http://capableapp.com/uploads/files/16754001100.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/zezojewisabikesogut.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/68877796015.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/21184082680.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/2e0bf41f575a7eb66363b51eac6290ce/58117098106.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5d251f3d2---74177504024.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/68124931569.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/firotamowakube.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/51400070616.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/72097518555.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/juwej.pdfIn PDF document text
    • https://rimi.sk/userfiles/file/93651026137.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/loparazupisi.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/85737281450.pdfIn PDF document text
    • http://joeun-it.com/userData/board/file/tidafuzebeboxilis.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/lukeribedefarabimemilaset.pdfIn PDF document text
    • https://sergiomauri.com/images/file/56611702050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=asphalt+nitro+8+hackPDF 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_off0000ce6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6F 17812 bytes
SHA-256: 3f7b62f3ac322a00a7ee5599d24ff7b45d13c48ae18c6948107974cf8908639b
font_01_sfnt_off0000fce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F8 10620 bytes
SHA-256: b10becafca003200437e736f5c566e615c4d4a27c844fb792c0b66ed9407491d

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