Malicious PDF — malware analysis report

Static analysis result for SHA-256 716002195d46d1a8…

MALICIOUS

PDF

74.8 KB Created: 2021-09-09 06:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e3df9d2f27c9c4c0b60744d578b71c67 SHA-1: 3c5fe97bb2a90c225fdf3ad9f61c75ae21bf71d4 SHA-256: 716002195d46d1a8a22ff8b55556f668ed3094b39b03068b6c8b5b7def659c57
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 links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pametnidom.hr/pametne_kuce/userfiles/file/28584564646.pdf In PDF document text
    • http://www.rajpuc.pl/pics/file/66261755604.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/gudalowozopomoposog.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/jeviduxaxe.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/vomuvajuzijogutovolu.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/mudijafemezuranedin.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/25603051057.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-5/20210905051351994896.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jofik.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/93523991309.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/3823942491.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/43153104463.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/07t8t2mq5md42t00bea9ef0rfu/42491174458.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcd7872572---62460615392.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368051c8bec---fimiwovopuvolose.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/24221660656.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/lurediwojopojinuxe.pdfIn PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/keguratew.pdfIn PDF document text
    • https://efnnma.org/files/file/12932747890.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/pozosasapekefoxe.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/7484124338.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/xekisofozefezate.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/54fb4af86892c1328424d204810e9669/senosasu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=adb+remove+frpPDF 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_off0000c244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC244 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA56 17520 bytes
SHA-256: 0d1a1177f3aeef81b3934387162e82184380b8bfe63f2873428ffdd71711c97e
font_02_sfnt_off0001071f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071F 10176 bytes
SHA-256: 1f862fa407d70804a6d03e25811859d9b502e6bd19501dcfc4cd35064ae11583

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