Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e366bdf5b0a4c5a…

MALICIOUS

PDF

73.6 KB Created: 2021-09-26 14:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 93f3191ddb94173ce764f2861328c0db SHA-1: a2eecfb5ea6b20aa6640acfcdca4aa8d7f789aa8 SHA-256: 8e366bdf5b0a4c5af51bc78e983610174da1ec37b8829df40711d27f4f53f91b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised websites and disposable hosting, indicating a likely phishing or malware distribution scheme. The presence of external URI heuristics and link farm patterns suggests the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://pantryscan.com/123cars/imagefck/file/36885027946.pdf In PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8917c683f131fbab85b1d64e28bdae9f/wemamore.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/sibosofizajuwuni.pdfIn PDF document text
    • http://paulabenveniste.com/UserFiles/file/gexonasedujejo.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/11989432411.pdfIn PDF document text
    • http://th-hl.com///upload/files/mobasew.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/terunudo.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1614caade617aa---71385128917.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/xazedufonugikufejemag.pdfIn PDF document text
    • http://kindergartenhelden.at/upload/file/jebakag.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/29141438671.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c892b04973---25972699889.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/bowapum.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/zesor.pdfIn PDF document text
    • http://bienbao.org/uploads/files/jalugosunumeturotex.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/98176214084.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/gomej.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/5778915385.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/gagibo.pdfIn PDF document text
    • http://gaudi.tw/upload/files/31457534613.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/92168472171.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/8739020277.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613117a1deba0---29756506606.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/tifivalefazepavexi.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138411c614b6---mewiviwijetukoku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=tazkirul+quran+english+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_off0000b8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E2 18576 bytes
SHA-256: 3661c522fffea720a654ac74bc8dfa6e122955879eb46121e15b25863f9264c2
font_01_sfnt_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF6 10920 bytes
SHA-256: 8bc5f6179d8a12016b19715ed716ed2aed9af9a5093f30a2b45855bf75fc3333