Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25970a78b2c8ffb…

MALICIOUS

PDF

71.4 KB Created: 2021-09-03 00:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0088c0a9da74d02248f1ce1730e2f5b2 SHA-1: 6fc7f0f2e4c11e796437807dead60e2c11efebef SHA-256: e25970a78b2c8ffb4d04acb5a07365c422cb300128c7907ba658b2c643ecc352
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous links to external URLs, many hosted on compromised CMS uploads, further suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 7

  • 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.
  • 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://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/7f733b753de02b3dd30771988d9359e2/9994232782.pdf In PDF document text
    • https://hchoanglong.vn/userfiles/file/15236075814.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713c3631298---zezimiviwubes.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608266f4442f0---4469815143.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/23827f77bc23e1e28084ded1df5d222a/4859748418.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/dunofaxisekataxuxa.pdfIn PDF document text
    • http://www.tivafa.hu/upload/file/zorazukij.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751ec1e9a98---61552504722.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/fubozuviw.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/kusugubopaw.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/suxozov.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4061e76ce---votagalefuto.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/32802720489.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/povewatiri.pdfIn PDF document text
    • http://ymmicro.com/files/files/soleruwetuwapezudaj.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f15d49e3d---39554636506.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/47768593743.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/guxenexinasij.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/29110246309.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210627_AB1D2F7A4546D600.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/0054e7e9gr55490cub2a2lal8m/memuzizetopob.pdfIn PDF document text
    • https://2acontractor.it/images/file/mefibawajewit.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210704082120.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/fogopare.pdfIn PDF document text
    • http://xn--kprq5pvqklteonubj6c.tw/CKEdit/upload/files/koxojotel.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/kuwijel.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fb4da907d---xabebimixamudadarat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=different+types+of+sewing+stitches+pdfPDF 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_off0000b8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A1 10892 bytes
SHA-256: 9b21d88b733405a42ae9bbd89786543327ba2a9a248f2d7d12a5e06ec8f2ca45
font_01_sfnt_off0000d1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BD 14920 bytes
SHA-256: a916ffe3d7c04e091fedd71d397e2aa3bbe53f2c4e7a3798e43f955ee3304004

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