Malicious PDF — malware analysis report

Static analysis result for SHA-256 83c57ca3096abba2…

MALICIOUS

PDF

77.1 KB Created: 2021-06-10 04:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc5b55cc978998c667568b21bae084af SHA-1: 0571703b1afbf0ee94c0f29cd74ef0dd2dc86e8e SHA-256: 83c57ca3096abba2eda24e76dc5253fee2587f833b1d922212d7d4397cda2886
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a lure for a "Zoom iptv activation code". It embeds an external URI pointing to a suspicious domain, which is likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/pbw?utm_term=zoom+iptv+activation+code+free+2020
    • https://static.s123-cdn-static.com/uploads/4403143/normal_6006a8fc92f77.pdf
    • https://cdn-cms.f-static.net/uploads/4421640/normal_60311f7b23398.pdf
    • https://cdn-cms.f-static.net/uploads/4421478/normal_6059c3e35676d.pdf
    • https://cdn-cms.f-static.net/uploads/4379045/normal_60418ac974fcc.pdf
    • https://cdn-cms.f-static.net/uploads/4421217/normal_6063b01fd46dd.pdf
    • https://static.s123-cdn-static.com/uploads/4370541/normal_60010800e6cbd.pdf
    • https://cdn-cms.f-static.net/uploads/4404122/normal_6041c0afe1a9c.pdf
    • https://cdn-cms.f-static.net/uploads/4403676/normal_60bbda2e67905.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://paditoxef.pbworks.com/f/alphabet_and_numbers_drawing.pdf
    • http://dejulagimu.pbworks.com/f/2005_ford_escape_hybrid_specs.pdf
    • https://uploads.strikinglycdn.com/files/43b7d260-3f43-42af-a75d-46fc4015759e/the_language_of_composition_3rd_edition_activity_answers.pdf
    • http://funinupun.pbworks.com/w/file/fetch/144565701/53418236910.pdf
    • https://uploads.strikinglycdn.com/files/ab251f8d-d172-42c3-b74f-42ac08c1ad84/maytag_bravos_washer_problems.pdf
    • http://xifatarege.pbworks.com/f/kesifagu.pdf
    • http://juxivos.pbworks.com/f/how_to_replace_battery_in_liftmaster_keyless_entry.pdf
    • https://uploads.strikinglycdn.com/files/67e0e935-a0c7-40a5-a246-9bfaa75a7de7/how_to_name_a_covalent_compound.pdf
    • https://uploads.strikinglycdn.com/files/c6af0249-6c43-42cf-b9e4-f5c2a3f8f01c/gujipevawofisetadavodi.pdf
    • http://detomipipu.pbworks.com/w/file/fetch/144518604/43230274450.pdf
    • http://betifufato.pbworks.com/f/weaving_it_together_3.pdf
    • https://uploads.strikinglycdn.com/files/56fabecc-1345-480e-80ce-c804206a4c5a/gufokuz.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc0f.bin
8187145963fbf8e0b7977f93bb9cbfc296fb812f6e2b6f40a3c8d31ca5a797a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0F 6744 bytes
font_01_sfnt_off0000ecf6.bin
538a416f847a0001f21d7ee04b8dd5570803b997f6665ee1da48844f96eb4738		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECF6 5384 bytes
font_02_sfnt_off0000ff3b.bin
2b98905d9bab36b8558b81248e001f9d20d089cea235f17cd61eef34e8a7f27e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3B 11284 bytes

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