Malicious PDF — malware analysis report

Static analysis result for SHA-256 879b800c4d1f7d15…

MALICIOUS

PDF

85.0 KB Created: 2021-09-20 16:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6c2d0a1f8b95090027033c18f611e760 SHA-1: a664362df5df1bb28df1e54b127e29c82db1f3e2 SHA-256: 879b800c4d1f7d15dbea3902b38ea3b5195f0f008d0b0d7c22451296b7159447
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript that triggers an external URI redirect. This behavior, combined with the high ML classifier score and ClamAV detection, strongly suggests a malicious intent to lure users to a potentially harmful website. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://laborke.ru/uplcv?utm_term=speed+booster+android+app PDF link annotation
    • http://villkasz.hu/editor_up/tozofulowomomufepuxido.pdfIn PDF document text
    • http://aqcorth.specialty-match.com/upload/files/gizejuxisegu.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/59709239950.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/44359366478.pdfIn PDF document text
    • http://vpecargo.com/userfiles/file/52013027051.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/lilugijopelapu.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/161324dc4e934b---navixix.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/jejamimosupukefef.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/xenotuwab.pdfIn PDF document text
    • https://gregoryshow.ru/files/file/74247365552.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jexoj.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/29942782382.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/29558751478.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/jexamanoma.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/malimevusiso.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/puderewomuxujoposajebe.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/47259708222.pdfIn PDF document text
    • http://irinka.org/ckfinder/userfiles/files/puluvalogax.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/selesijimujunafu.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc2991d98c---kexinaxevefovofe.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/domeposilimo.pdfIn PDF document text
    • http://chugguwang.com/files/fckeditor/file/xemep.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_off0000e79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79B 18056 bytes
SHA-256: 9a5508903dd1df6e1334083e1787c7f1819c785337e504964d0949105e354286
font_01_sfnt_off0001168a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA1 10556 bytes
SHA-256: 955c8d67466384ce270b27469ed222488328008b1cd17ffcac369a17980678f6

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