Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fd35a310dd5d71…

MALICIOUS

PDF

79.5 KB Created: 2021-04-04 06:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad3d7af6c5b365c1b3181111b05de4fb SHA-1: a542ee96176a240c9adc9d290654e5f2f8d044e9 SHA-256: 09fd35a310dd5d71a154154708b0957aff9dcd9ad94b3cc7158b0f4cd776b4b2
104 Risk Score

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 external URIs and a visual download button suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to 'application format' and 'pdf', likely part of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/award?keyword=rti+application+format+in+telugu+pdf
    • https://tedumevoseviman.weebly.com/uploads/1/3/5/3/135311532/mowesojo.pdf
    • http://marafonsport.site/neha_kakkar_songs_list_mp3je0vz.pdf
    • https://cdn.sqhk.co/nefikelifu/Dhiakhb/shake_the_monkey_tree_pub.pdf
    • https://static.s123-cdn-static.com/uploads/4402720/normal_5feeaea28135a.pdf
    • https://static.s123-cdn-static.com/uploads/4381748/normal_5fca27ca96e68.pdf
    • https://cdn.sqhk.co/gexopoku/fiagjhf/zombie_apocalypse_doomsday_preppers.pdf
    • http://blue-tick-central.com/7th_class_english_grammar_book24y7l.pdf
    • https://static.s123-cdn-static.com/uploads/4460694/normal_5fe4b9c8adfb6.pdf
    • https://vubeluzuge.weebly.com/uploads/1/3/4/3/134357782/sowodojamowujuvo.pdf
    • http://hellesypakk.online/junji_ito_collection_anime_openingqyewk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdd249b8-77b1-4a94-b024-8995efe4d959.filesusr.com/ugd/d394ff_4af908e582e04ea29ec516d01d2a417b.pdf?index=true
    • https://e7c716eb-dbe2-47e6-ba66-22a9c09b3d16.filesusr.com/ugd/a58502_8d59778dcee34921a9716b08a30b53a9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0c2b6b06-8eb6-4c0d-b4b9-1c6e64618a2d/gedubiraparelejadetuka.pdf
    • https://uploads.strikinglycdn.com/files/68b463bd-afd4-4268-b436-b62adb2299fc/petition_for_formal_administration_florida_form.pdf
    • https://uploads.strikinglycdn.com/files/df9dbe35-59da-409a-93bb-1bc4dbaaabf1/latest_seminar_topics_in_computer_science_2017.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe0.bin
5e667347790e82dc27409ab17c8b329da66a09f921c14a1a8c94704d917443de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE0 5304 bytes
font_01_sfnt_off0000f1d9.bin
318ce63d5077a27f7ce5604aad7e34c287117ccb862febdef5895f3846de3c49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D9 6924 bytes
font_02_sfnt_off000107bb.bin
dfbf05e77767cb3c029128387155c374dd6cf66315249bc86d1a9afcda1758b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107BB 11376 bytes

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