Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a980eb672f8fb66…

MALICIOUS

PDF

80.7 KB Created: 2021-07-24 03:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: ad2e8b52e557d48d61b0ad522777257d SHA-1: 4e7774ddb8dbea6090082ef8df75681fd4265b4a SHA-256: 8a980eb672f8fb663c524fb05b7cd73ef33d57ef25e737d9b5e4c7a8b20ed830
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond the presence of these links.

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 https://roc.mn/uploads/files/pubesox.pdf In PDF document text
    • http://adaviestransportltd.com/userfiles/file/66694433392.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/f967cfd02b46ac923ded65f74d40472c/zokezumuburufuwinina.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/49951346987.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b87b172c6b2---16303951980.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/19079637786.pdfIn PDF document text
    • http://gtshotel.it/images/file/20438906696.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6873664535---65896016188.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/48c68b08032e0486986483298088e26f/poxet.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/wetogokenenewitobonid.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c34c9f2ab01---27394610476.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/si0gir7g8k2fmcan6qajp87irj/46245769023.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/98c3d1443af85dae96c410d62f382386/xadapokegodowirazunij.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/fazosuw.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/vefozasurifoguwevuz.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/88802924689.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/nj1jncvdkcnd0n3qev0v51s5r8/feteregekigegumibufufus.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071671bc1b29---73152505306.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/14088064499.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/51469710633.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160966f56a19a5---zujesoxifukan.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/72994879893.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/71fa9e8f3e1cc65f6d000219aaf63d5e/99162366043.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/32640078280.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/66597799113.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=exercices+sur+les+solides+cm2+a+imprimerPDF 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_off0000d39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39C 10776 bytes
SHA-256: aa782879b4a66b582b1a7450db3ac2cfd5e5e16c48aac8044d3d7ddc0a61c5fc
font_01_sfnt_off0000ec7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001048f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048F 18032 bytes
SHA-256: c183add10e21fafc4aab3cd93f4225de822270d9ced50ef1dcdb33a586f0b5df

Open this report in the interactive analyzer, or submit your own file for analysis.