Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69152fc7d48a408…

MALICIOUS

PDF

83.1 KB Created: 2021-10-07 03:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9c3440597c79e453cc5dd965d23b534b SHA-1: fcc085be017589512bf5270de09d792a3c98573c SHA-256: c69152fc7d48a408eb9738566f39f521a88df6a0147ad9930c5169eae3966785
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • 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 http://educaholistica.com/resources/img/imagesck/files/55754165211.pdf In PDF document text
    • https://eko-briketes.lv/userfiles/files/kipalatinunubebukuf.pdfIn PDF document text
    • http://methese.com/upload/files/10547329743.pdfIn PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/tosemilek.pdfIn PDF document text
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/38475496760.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/1633187019574639533.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/fubipab.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/1ukd2udekfbf1fqandjs6h24b3/10979112632.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/62108095863.pdfIn PDF document text
    • https://istanajp2.com/contents/files/12492577638.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/66364976231.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/96069305970.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/pulodozili.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/4dc02007e2f6fa24e88746d980e01c1d/69052799606.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/ea744cd3741a4423bd239b48cb3e630a/famepadetawajaxuzidexosi.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/migudinavibowanimetaka.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614a1ccc0175b---36983449175.pdfIn PDF document text
    • https://4u70t3k0-4tl.com/contents/files/xomatolutejukobojali.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141ac86edd0a---62454493186.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/51903067646.pdfIn PDF document text
    • https://hung168.tw/UserFiles/files/19735708980.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615e1e0766f47---27325569155.pdfIn PDF document text
    • http://lilipoupoli-drama.gr/lilipoupoli/js/ckfinder/userfiles/files/wesifevosonaxekipeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=dark+side+of+the+moon+odyssey+guidePDF 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://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_off0000db39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB39 20812 bytes
SHA-256: e48cb80f05f15a4cc12527420f40721817c17a48b0e80b41499d0090da91c073
font_01_sfnt_off0001105c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105C 11060 bytes
SHA-256: c5d7f28d9fb240eaa5b6c1c3ee1816c0b33c5bab8e0f8baa8e70caa44ed0ca0c
font_02_sfnt_off000129ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1