Malicious PDF — malware analysis report

Static analysis result for SHA-256 1199e149f557f2b1…

MALICIOUS

PDF

82.1 KB Created: 2021-08-16 06:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4c6046bd0a6977d1d4c496e1793a61ab SHA-1: f97cb3119ce7251acc71a69d2af5ca1e973044f6 SHA-256: 1199e149f557f2b1d39889bbd8f31b5dd34aaa7696ed03525f99f44c9ce17149
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The file contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute malicious content or phish users. While no scripts were directly extracted, the presence of numerous URLs on compromised sites indicates a likely distribution mechanism for further payloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/2e80d9dc4dd57e3a473b68bbb7f95e1b/joripolor.pdf In PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/5d98e7a678616aa12aa8597406636e26/33780509854.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/3fa0cb249aa2091d51908ad8f6823519/pavuxavomuwotegimo.pdfIn PDF document text
    • https://eingangrad.ch/userfiles/files/15599496614.pdfIn PDF document text
    • https://orangerun.re/photo/files/duwipujifasemavezokukit.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ce76f16d2---daxuda.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c25b8fec7---89674700077.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609162148f27e---93265210348.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/51042987072.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a50a8e2fc5e---78154302965.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/21578940185.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3b73a2fc3---87021895034.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/gabuwasagom.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b9bd7cde7a1c44c4eb356fd132aca91c/71582579633.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/97d53c789ebdbb5ba559e49ba0b78a93/sajilugojiziseke.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/noliri.pdfIn PDF document text
    • http://kotolantopeni.cz/file/93600842562.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eead918b62---tidozipigovoser.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/72907843195.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/getowavugitotefimeruxi.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/libikesuletoverimuxu.pdfIn PDF document text
    • https://pmms-online.com/assets/file/domesezel.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/o65rthro9oqse6bvjbrcma9qv5/fatunawalinivobotaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=beamng+drive+download+free+full+version+no+keyPDF 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_off0000dcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF4 11112 bytes
SHA-256: 119ec83bd65da44a1b42bae41f46743493813e60ceb853d1034e239c904c863a
font_01_sfnt_off0000f6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 16624 bytes
SHA-256: 8141c5bec9f524196b103aaccc62d0e4c8dddcc8f66fd199eec1f24693f865d7
font_02_sfnt_off000121bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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