Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30387166363e387…

MALICIOUS

PDF

72.4 KB Created: 2021-09-26 21:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b206962649fc5637035faa53d9149dbf SHA-1: 7013ff6665660a6cca30bcaf52e9ab0d5cc7c0a6 SHA-256: e30387166363e387ce0e01b26b6f83d1f55b0d716fd39cb009966552860f68ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The document body is unreadable, but the presence of numerous links suggests an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nesthomes.in/userfiles/file/58098038861.pdf In PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/7443efb2b13fc533da0920c60754d495/113328395.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/38956913629.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/ramax.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/8776361972.pdfIn PDF document text
    • https://strings97.hu/userfiles/file/12902631764.pdfIn PDF document text
    • https://kuepancong.com/contents/files/moseru.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/51526150673.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/88551328975.pdfIn PDF document text
    • http://greece-ex.com/images/blog/file/zajupikoxoti.pdfIn PDF document text
    • https://inprovitchile.com/ckfinder/userfiles/files/84257451771.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/zudowuwibibujuli.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16148b4f184338---42428782371.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/45067600889.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/zukejevuvebosezizezopa.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135c07e92956---4148842881.pdfIn PDF document text
    • https://domilot.com/uploader/files/fodijefilogenijasoretiwoz.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/933e34443a210ab60d74a905094ba314/40370981943.pdfIn PDF document text
    • https://fond.ru/userfiles/file/jomuvuruxadu.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/sizutugosedimekebu.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/naxobazabineso.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/1b98dda35edcd9a4088d75976b8f6357/vekepejajekaserojomux.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/wepusa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=android+how+to+change+screen+lock+timePDF 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_off0000b3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E5 10976 bytes
SHA-256: e07670290384224f28d2353cfa7b385f5675cafc83dfa77af95c22b09ea32249
font_01_sfnt_off0000cd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0A 18072 bytes
SHA-256: f98a14e824f81a91b98103efde637ec472b05b48af6ba61ab1ddc4c821638e00
font_02_sfnt_off0000fc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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