Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a445791b2715b6a…

MALICIOUS

PDF

251.0 KB Created: 2021-03-14 11:19:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: db2ee20648bf8d802c3d17c37d70ce88 SHA-1: 1eb52a291e5f483de521bb0b40ee18fd4d1b936c SHA-256: 9a445791b2715b6a4dad0004d132d31fd51c741455544ddea71bc53e82fb5687
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of multiple external URLs and a heuristic for a visual download button suggests a phishing or social engineering attack. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL, reinforcing the idea that this PDF is designed to trick users into clicking links that likely lead to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=biblia+ortodoxa+pdf+gratis PDF link annotation
    • http://gotesesevuzi.iblogger.org/how_to_use_viewsonic_projector_remote.pdfIn PDF document text
    • https://juxeduwabup.weebly.com/uploads/1/3/0/7/130775558/3702129.pdfIn PDF document text
    • https://balijijileg.weebly.com/uploads/1/3/4/5/134505585/3988422.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387811/normal_5fde3be805b07.pdfIn PDF document text
    • https://gimituwemowi.weebly.com/uploads/1/3/4/8/134872285/xenuvomokufozi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5fcae829b29ce.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/7982189.pdfIn PDF document text
    • http://tubudemawaxoki.iblogger.org/61059636269.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409421/normal_5ff7120225448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444386/normal_5fd8d01e3239e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412573/normal_603926d0355a9.pdfIn PDF document text
    • https://gutugifowofe.weebly.com/uploads/1/3/1/6/131606479/7925600.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/98732506-28dc-4815-a1dd-500c3f2c7b55/sozej.pdfIn PDF document text
    • http://kibuwigukakew.epizy.com/audio_visualizer_software.pdfIn PDF document text
    • http://pegowalinasaduk.rf.gd/sufadevefugul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2191db3a-09fb-4e0b-8d25-3b0b9b858dbc/remington_chain_saw_replacement_parts.pdfIn PDF document text
    • http://welidigukiru.epizy.com/allegiant_tamil_dubbed_movie_isaimini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c806a0a6-3237-46c9-b6d7-d7e5bc57d38d/does_exercise_reduce_iron_levels.pdfIn PDF document text
    • http://puwojewemuxa.epizy.com/genetic_mutation_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82792b2a-dfe2-4c58-a5e3-11591f79273a/32627813495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4acbfb53-f790-49c5-98e9-681e9225d92a/why_is_the_furnace_not_blowing_hot_air.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16198c00-dba0-4886-8f77-5f3477377226/26374308611.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 8

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_off00039ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39FF4 5468 bytes
SHA-256: 2191ae9124ade2a5dd63dda6e2c4c2a67862ba55a4b689daac8333e632607641
font_01_sfnt_off0003b29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B29B 13156 bytes
SHA-256: 5309187810f971d404104cbd83e9686f8a4c765b594b9eb3a8114ac34141cb42

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