Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7103e7e582baeff…

MALICIOUS

PDF

80.4 KB Created: 2021-09-12 08:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5396ee2767da8a8d4af383c4fb0ef2d1 SHA-1: 2b0716aaca49c947f9dd16795da01c85d7dad7c1 SHA-256: c7103e7e582baeff80eeae601f808f6741242982d4c52b534c8c817d3aefeab5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's primary purpose is to act as a link farm, likely to direct users to malicious sites or for SEO manipulation. The ML classifier and ClamAV detection strongly suggest malicious intent, with the embedded JavaScript potentially serving as a secondary exploit or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://dialogueinpraxis.net/files/docs/48222581019.pdf In PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210908_035955.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/66298705053.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/76c0a0ced5af471140823444e3ee3d92/xixuwobusoguxisev.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/74960685854.pdfIn PDF document text
    • http://wx-bm.cn/upload/ckimg/files/202109051820503639.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/virikimijefurelafikos.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613222e1a8968---rodolifetuxamutukuvu.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/26840815795.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b929425ed2---26651212326.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210912123528.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/batuwedujudi.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vsjgoaso0hulvcin11pfc3h3l2/jesakuwarabudum.pdfIn PDF document text
    • http://maychieuvinh.vn/upload/files/53106623955.pdfIn PDF document text
    • http://topflexsports.com/uploads/dulexokajug.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/74480985797.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f5309105d---25305660063.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/44516718890.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/47969782475.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/28953490744.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/vixirasogelokulogidozub.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613d05cb7dc02---49364904563.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/duwizudakojubudaku.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202194819511959.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/sulosumidifomijud.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/29022589227.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/rajoka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=mario+odyssey+piano+sheet+musicPDF 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_off0000d5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AD 10940 bytes
SHA-256: fdd73c5d7608066b318ec2b26a94f837410fa3f207b3108b29408dedb816db63
font_01_sfnt_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EF 17368 bytes
SHA-256: b851f3969af5faa15895112f9068f65b01fda67b124aa112834d4ca245a2ff79

Open this report in the interactive analyzer, or submit your own file for analysis.