Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b17c9b4c87e91b6…

MALICIOUS

PDF

80.1 KB Created: 2021-09-06 00:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e6615e984a2ae584f25384107a8031b9 SHA-1: a2b48b65e0a18a4b80eb77390b7f272d94ed414a SHA-256: 7b17c9b4c87e91b63467a2504fed5a3a53dfeae500e6f20c4052e1cb24457204
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content. The presence of multiple external URIs and link farm indicators strongly points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • 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://betenagro.com/sites/default/files/file/42279511481.pdf In PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a371538e4---poganomaloperajodakumelot.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/46820547859.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/97053165083.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/lixufuf.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fd167129b---15701408063.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/dfc90d8ba8d332a42b7b92defb9dab40/83868396458.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0deb0192d0---pomos.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/2dc8af879c460f28a9ccfde1ee796e64/58850175423.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/upu49o5a6qjkumchb2n3lrjh77/8652998950.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/uja8k5i9qil0kd9v46n0tvdv96/tudibagojigus.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096760ea3fee---tegovo.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/busefel.pdfIn PDF document text
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/goruvizaravukamenaliwemi.pdfIn PDF document text
    • http://penzion-u-zamku.cz/files/file/resewenakodokoz.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/13913896438.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/22702073166.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/witanixuvusipadig.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19111179983.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160887b7eaf80b---1630263969.pdfIn PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/11609161311.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961ba041bd5---40551615214.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/24323567461.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=past+simple+past+continuous+multiple+choice+test+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_off0000d4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C1 17384 bytes
SHA-256: 65a826b99d738887355ab470990e8dcc4c0575ca17d893ff8ae1775026babc19
font_01_sfnt_off000101cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CC 10888 bytes
SHA-256: ce62d3e3f3c07559316dae8cf66b73314144b92e52aff850504e6e59ce0c4207
font_02_sfnt_off00011ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1