Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f2d98886f3f791…

MALICIOUS

PDF

88.0 KB Created: 2021-06-27 08:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03118afe6900f7414e300bd1b2368daf SHA-1: ecb2488fc41a5b6e729f8e0e6d658a258df70e17 SHA-256: 60f2d98886f3f791b63b482da54fea9ea99896a260ea1f864af69e076aaff117
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple distinct hosts, many of which are hosted on compromised CMS upload storage or disposable domains. The embedded URLs suggest an attempt to lead users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://garderoba.sk/images/_file/624363329.pdf
    • http://to-tuong.com/media/ckfinder/files/zugoxigu.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d61223c9a9---34960405351.pdf
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/lifuxododazowit.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/6216hkfurrqbvu9ikhj31am002/lubuporuzapaj.pdf
    • http://alexhoffordphotography.com/temp/files/file/jetukif.pdf
    • https://audit-advisers.com/userfiles/file/valatilip.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/334549d7453e15013d3c3af0b9d7a989/koxufoxesufuravegejoto.pdf
    • http://sun-eko.eu/files/file/kogan.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160845656c6ecf---nabepitijeropokoj.pdf
    • http://adamlegal.com/userfiles/file/4236684467.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/q7mpgiertgu07kfedr6pfq8nn7/topedazuxu.pdf
    • http://chothuethietbi.info/img/files/54098249999.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/ijnpplpdp7bpbthi0rhfvkq292/lijezivu.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940fdc6cafd---nuvon.pdf
    • http://scuderieverdina.it/scuderia/userfiles/file/10640753783.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/5ff72bd49a42c91f00bae5fa9f741be9/57331412406.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ef8a10b6a---vufexamimuzovuravonis.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/b14d01fc31054bbe56ec723149b67ba9/zodudebidozija.pdf
    • http://wamer.org/userfiles/file/fokaxon.pdf
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/pisujapaximuralix.pdf
    • https://cihangirhotel.com/upload/ckfinder/files/nuninefota.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f2cdef89e---67551001760.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f46e09262f---28637275654.pdf
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/87326932617.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/4fadad85673698021af0913a590d74ca/10623396510.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=sentences+with+just+in+present+perfect
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f197.bin
0678f1417ed36fbf9cbe6602d8a5c6c65dfd5777adc7cfc56a0e05441564d4c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF197 18316 bytes
font_01_sfnt_off0001209d.bin
22422705c3909205f767c07470736c9da0bb6b33cabbf1ed63c7bec7b90cedd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1209D 10640 bytes
font_02_sfnt_off000138e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x138E8 16792 bytes