Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9491c091a6a2538…

MALICIOUS

PDF

79.6 KB Created: 2021-09-20 01:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ae3344ce98039bbeb7796bd56b9fd010 SHA-1: dbeda0528eb6614114734202c0c381190675ac40 SHA-256: e9491c091a6a2538c2cce8c371435d8fba2e849f8f4e3baa238d2cf33b73a0bb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://na3.it/misc/file/kesaroj.pdf In PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/94242219114.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/xiros.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/24347468318.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/33902207375.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/3864227707.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/17359462809.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/tifuporo.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144d91ddf12a---74556513865.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/timupug.pdfIn PDF document text
    • http://contua.org/userfiles/file/77713952930.pdfIn PDF document text
    • http://findingthegrey.com/userfiles/file/73100860043.pdfIn PDF document text
    • https://tedesco.pl/userfiles/file/radevegivanen.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109051153430483.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/80757387540.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/gupopalotivinilefir.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/zarenifomepotop.pdfIn PDF document text
    • http://dywin.com/uploadfile/files/zebexitapijoro.pdfIn PDF document text
    • http://cocoal.com/uploads/file/82257876042.pdfIn PDF document text
    • https://seerupit.dk/assens/file/96998539561.pdfIn PDF document text
    • https://factorysales.com/userfiles/files/58475641516.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/33360564364.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc35cf2836---tezatufixasiteki.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/28719215780.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/49785055866.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=android+tv+kodi+setupPDF 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_off0000d2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CA 17768 bytes
SHA-256: 9c292be5931f7f1dd37218c732b292e7dd6fec75dc90a0c69b58724f8ff7c425
font_01_sfnt_off000100f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001190b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190B 10416 bytes
SHA-256: ef4c33f85ed2b443e7b0c65403947c93a12246f6df9d827b9e9533aaeafae7cb

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