Malicious PDF — malware analysis report

Static analysis result for SHA-256 232dfc5792c09469…

MALICIOUS

PDF

68.5 KB Created: 2021-09-20 04:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 678aeeb8fef5941c1d504c6719b5b4f5 SHA-1: 3a4a71607b14f955c77fb6a74727ffd4e5066fcf SHA-256: 232dfc5792c09469c04482c4e2fe755233cc7f27ffd7a26778d369a41be22410
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript may be used to further obfuscate the redirection or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://ketchas.ru/uplcv?utm_term=hdmoviearea+download+web+series PDF link annotation
    • http://scuderieverdina.it/scuderia/userfiles/file/bagesixutuza.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/68440658555.pdfIn PDF document text
    • https://8cj2aja7-8mxb.com/contents/files/xelimajuluzasolekerime.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/24902328610.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/69218923445.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/31355415804.pdfIn PDF document text
    • https://pu-sk.com/app/templates/js/ckfinder/userfiles/files/98647784762.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/51490734022.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/c4b86ddf6c19f7a6ef67e077e34f4403/lobetezazuxiduxab.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/bokudedegewi.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/roruzebo.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/65692783748.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/67759930127.pdfIn PDF document text
    • https://toocapen.com/files/rusunaj.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cdac0ee46781aef5a1cb27e5b1615136/nalerewidetenulinor.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/c7cf5b26feff2cb11117bc99752dc4c3/39854623642.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/golipefozemagozaxusowun.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/72225512925.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94190523238.pdfIn PDF document text
    • http://compufoxmail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/deviloti.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/40521805857.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/jifadimufiduvuwavudavup.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/1502244021.pdfIn PDF document text
    • 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_off0000af49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF49 14876 bytes
SHA-256: 724f11eb68c2bd27cff6dc860ea3a8e902064c3a9ed841d52e34f4b5b03bf59c
font_01_sfnt_off0000d495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD495 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ecac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 10596 bytes
SHA-256: 5702026f145d9b636228fb2143173794979330ee77a97db562ac75f7706e6789

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