Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5537790ad9f5cd…

MALICIOUS

PDF

76.4 KB Created: 2021-04-06 00:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eba2bbf94fb19b55e23486bc36fc34d1 SHA-1: 02146a7e2d62eb0eb0dc9eb5fcf0fbe9339bcd00 SHA-256: ec5537790ad9f5cd2c91d6caaccf0b70394b5171ef346d1b8478fc71229d4304
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate the presence of external URIs and a high ML classification score, along with ClamAV detection as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Arabic root words dictionary in urdu pdf'. The primary attack vector appears to be directing the user to the malicious URL for a secondary payload or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/award?keyword=arabic+root+words+dictionary+in+urdu+pdf
    • https://cdn-cms.f-static.net/uploads/4476007/normal_601b64e84ac67.pdf
    • http://putifid.iblogger.org/research_analyst_job_description.pdf
    • https://cdn.sqhk.co/leredupodeka/fjiddgi/64584151558.pdf
    • https://cdn-cms.f-static.net/uploads/4463526/normal_5fd890b6dd546.pdf
    • https://static.s123-cdn-static.com/uploads/4464720/normal_5ffae83833506.pdf
    • https://cdn.sqhk.co/numanazolov/iXjajaw/82734004981.pdf
    • https://cdn.sqhk.co/pefisemise/hiNwicG/download_sonic_dash_2_mod_apk_versi_terbaru.pdf
    • https://cdn.sqhk.co/zomulusiku/jhgsCji/homescapes_hack_ios_2020_no_human_verification.pdf
    • https://cdn.sqhk.co/dutaxato/oijgfy7/wodulejevinaxakuraluziwe.pdf
    • http://ganutaragifak.22web.org/ti84_plus_ce_charger.pdf
    • https://static.s123-cdn-static.com/uploads/4371790/normal_5fc6c8d39d53a.pdf
    • https://cdn-cms.f-static.net/uploads/4383680/normal_6052836398a88.pdf
    • https://cdn-cms.f-static.net/uploads/4402745/normal_60691a0c592f8.pdf
    • http://jebumivusesujan.iblogger.org/fort_bragg_marine_weather_report.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sefukirexuwekij/wazuvukixulisis.pdf
    • https://s3.amazonaws.com/sowewazulejewi/when_christianity_started.pdf
    • http://fuvezijejek.epizy.com/85236245072.pdf
    • http://ratazudawi.epizy.com/augmented_reality_in_education_a_meta_review_and_cross_media_analysis.pdf
    • https://s3.amazonaws.com/tipikaxe/xemobokarok.pdf
    • http://rurudowofalav.rf.gd/48409912949.pdf
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed5a.bin
d3c117d9d67c1f8c2974e48247c08a8a4f4983471d5c8fe769c1b758c4767e53
pdf-font-stream PDF embedded font (sfnt) at offset 0xED5A 5440 bytes
font_01_sfnt_off0000fff6.bin
1dc955ce87195cc75194d545fe85f1b28d4519dc93958cd58ffca4701ab4aa2f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF6 10716 bytes