Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e12a6f88d50afc3…

MALICIOUS

PDF

67.8 KB Created: 2021-09-24 13:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e0fe4f4865820cbaa9684ac7c14e0948 SHA-1: 5757f48e9cba202710e150f12f5aa34b41b2e2b1 SHA-256: 7e12a6f88d50afc3d38688eb68859a773b5a7b4492f2cd91267933bc8ffd34ab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://huntic.ru/uplcv?utm_term=cheat+no+cooldown+mobile+legend PDF link annotation
    • http://terezmisszio.eu/files/file/88522058929.pdfIn PDF document text
    • https://pindimana.in/uploads/file/xajinifidagi.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/um8tk58pfqj4973ig85hi6o6e9/fuxurakiruposeporux.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/89912350377.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/fidabuwebexadapetusiduga.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/zesur.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/bezowipixujabele.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411d4489a10---lupejidodesasowepewuko.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/wekixolinujef.pdfIn PDF document text
    • http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/89915691560.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/151949419.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/bamiwerakegokivaz.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/xupepelevarowo.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/75345078345.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/87002900807.pdfIn PDF document text
    • http://trieuduong.com/images/Download/22401715793.pdfIn PDF document text
    • http://rococosofa.com/files/files/11677230377.pdfIn PDF document text
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/zadexave.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/88134971257.pdfIn PDF document text
    • http://vucert.vn/uploads/files/nojujazada.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/wuzodexejovutisap.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_off0000abc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D9 10804 bytes
SHA-256: 5930b7704760e8586b6d2623aabad8c7a4b784b52a337f6d8a64d3464e92f7f6
font_02_sfnt_off0000dc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5B 14920 bytes
SHA-256: df1e6a4ad6098028edc4c59ef3a36d46f4f0b6bbb26c6734f37f5d1350ad5500

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