Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c7adc07c97770d…

MALICIOUS

PDF

85.7 KB Created: 2021-09-05 18:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fc75e6ff1e2de456b4daa641f386b996 SHA-1: 678cbe98f7fb522ed5b1ac3e279c5409e084b72e SHA-256: e2c7adc07c97770d93f62f626664ee2355cb2f2c96051c3b1ae254d217d0d95d
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised websites and disposable hosting, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b576f6c68d2---gexixilupugoru.pdf In PDF document text
    • http://stevis.cz/files/file/83510785577.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/59521799564.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/fbeaa8d1ee723a669000fbd2ad2667d9/tomiwajowefakojegakar.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/78399672630.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/59224228681.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774f1976850---sisaxobizeduwofu.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/xutosevofaduboxuzamog.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/juwojugab.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/ad4a5fa8a64be047407787ab60f1ac6e/62828564790.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/11715529974.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/b4e01c1b5d05e4a3b1b0cee085720f1b/wepofojivite.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/5582552611.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4166265867---78257077936.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5ejcevjljtgmai494eg4199s97/90733937439.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/19934183045.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/wuvilav.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia/files/91952936542.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/27662910777.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/punugepazesilele.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/ruxozal.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/7ncqirremj4tu701sr7hbu3o05/85704561236.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/jli2s7d06aeovjk5rhal2h6gc0/48342144640.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/83497729746.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=experimental+research+book+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/9e0d5b9d3068fede24627db94c042a47/87358157021.pdfIn PDF document text
    • 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_off0000e959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE959 11200 bytes
SHA-256: a530453da057cf3abf670659cfaa3d06a73b6aac40bff4d887dc2a41a54f5f15
font_01_sfnt_off00010322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10322 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B34 17632 bytes
SHA-256: 12b81a510ea54410296ea706b3a384abed40f66fc5167ecc164dde3fed9cf1a2