Malicious PDF — malware analysis report

Static analysis result for SHA-256 5523bfb8d7336a49…

MALICIOUS

PDF

72.5 KB Created: 2021-02-20 23:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: af6549743bca7330ccebf112817bc154 SHA-1: 24e9e0d0e883814c70bd93680dbe464e1e6dd681 SHA-256: 5523bfb8d7336a496380e410dab95c1c786e59264341332963eb6cb66a80044a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to a 'Walmart photo 4x6 coupon code', suggesting a lure to trick users into clicking embedded links. The presence of multiple external URLs, including one pointing to 'jacksth.ru', further supports the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=walmart+photo+4x6+coupon+code PDF link annotation
    • https://cdn.sqhk.co/rabataxuvax/fghiehb/knight_rider_2008_car.pdfIn PDF document text
    • https://cdn.sqhk.co/medipevagopu/g1jjh0T/73315557084.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/hidgegj/congresswolf_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/lewatesudo/tXhbjbj/mafunafinik.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/gixKchd/89462676342.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/egjgihb/48409328663.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/jgPjaz2/pokemon_go_friendship_level_up.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/jbjdibm/nail_designs_ideas_to_do_at_home.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/44jdig9/48841791803.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/eP1Ijjd/how_to_draw_anime_characters_step_by_step.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/memexelu/ammyy_admin_3._4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/13539410484.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/94268490007.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/gamit_ng_malaking_titik_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/timovokajuxekerojidijoker.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/tamilrockers_2016_remo_tamil_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/bosunimifaxenorewi.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/7954474711.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/kivigazelinawu.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://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBF 5456 bytes
SHA-256: 7ccb8d7733766dd1c9547d0eb54c55a6bdee52d9869fb913da8d453a89f38c9c
font_01_sfnt_off0000ef38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF38 11020 bytes
SHA-256: bdedd7877f8f2996901f9f7c457229a903094165fd63943374411847a26d3403

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