Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0c070bb91c5c46…

MALICIOUS

PDF

79.7 KB Created: 2021-09-13 10:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0ed6fa561217aeb13b10168d5bdc8e69 SHA-1: dd17f022723f893472804aa2a868b9d126b739a2 SHA-256: ea0c070bb91c5c46ebff7018853c9426386a207e555456ddfa86cc0b42206045
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains a large number of embedded URLs, many pointing to disposable domains, and is identified as a link farm. The document body is heavily obfuscated, but the presence of numerous links suggests a phishing or malware distribution attempt, likely leveraging the 'how to send emojis' lure to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370c4d4136d---buzozovufoso.pdf In PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/xujixisozu.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/54526712988.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/59033021933.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios/files/vemuz.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/sugafa.pdfIn PDF document text
    • http://registermycompany.in/admin/userfiles/file/11753673141.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/wadepoje.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/zegovufowojakozupejete.pdfIn PDF document text
    • http://topflexsports.com/uploads/52237740570.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/megijimefap.pdfIn PDF document text
    • https://maconlux.ovh/userfiles/files/kezixelaxo.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/65123882302.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/11455487262.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/82532230757.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/78549445285.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/72921635417.pdfIn PDF document text
    • http://darstin.com/userfiles/files/zuguxiworupaxefegovavoxut.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/texofegijapixadigipejogo.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/33720088363.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/pemuxinenoledetak.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/87407984554.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/sokeriripisenowola.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+send+beating+heart+emoji+on+whatsapp+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_off0000d05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05F 11140 bytes
SHA-256: ba0d0448256a7396f4b2683c0665d7cec371d0ecbc2296627ec3b002ca5adb91
font_01_sfnt_off0000e9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 18152 bytes
SHA-256: 83f88f5f8bb900041ebd88fb9bcd6049ad95a3b9ef8fb8180df36e6bb8369e17
font_02_sfnt_off00011896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11896 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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