Malicious PDF — malware analysis report

Static analysis result for SHA-256 e517d83f9342dd2f…

MALICIOUS

PDF

83.6 KB Created: 2021-08-20 04:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dc5c0653c134b47bfc39b89428213c31 SHA-1: bb0fe5e90af78bfb98086542ed3203c98761d669 SHA-256: e517d83f9342dd2f5000e52dba4e17c21356966d986b0de2383331bf3d47fd1b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a URL with 'utm_term=fear+and+loathing+in+las+vegas+download' indicates a lure to download content, likely to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://safewatersolutions.in/ckfinder/userfiles/files/57330631775.pdf In PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/pigav.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/11951723252.pdfIn PDF document text
    • http://cosmik-kino.ru/sadm_files/57467895030.pdfIn PDF document text
    • https://tch.lu/files/files/40517083590.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/49415016295.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086a021baa3e---41824204989.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071fb1b10ea2---zimuzumakuwikejopi.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/64719719447.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/71507750184.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/541637301.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/juseritewijofemiv.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/pabozi.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/takeginagadukixu.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/15462277863.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/hhav3lv5eb5g3bvcm6ts2jltrv/biwomexifaremativotak.pdfIn PDF document text
    • http://tulga.ru/editor/files/95947296850.pdfIn PDF document text
    • http://prosquash.by/data/nipije.pdfIn PDF document text
    • http://blsfamilyreunion.com/clients/1/11/11e20eb1c47c3498ff3e66fc1941d138/File/97384450622.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/sosixeg.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/bukazugeledural.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/zevote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=fear+and+loathing+in+las+vegas+downloadPDF 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_off0000e265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 10656 bytes
SHA-256: b678df461f631f20899ece475baef8368aea176610de94babfd54f56f6f0c228
font_02_sfnt_off0001129c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129C 17356 bytes
SHA-256: f6a2f7c00037e4f9c005a7b46c112e28fc430c7a267dcb2e6642c753b955a656