Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c5972f931b0af1…

MALICIOUS

PDF

79.9 KB Created: 2021-05-22 10:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4bd256507a485f4a84245fa9cf0b16bc SHA-1: 7f0fe97305f0d045737528723faea5d929e47c5c SHA-256: 16c5972f931b0af184489d0044e4872e6fd64f12e87505b15bc69e186ff75a96
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. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing or trojan PDF. The document body, though heavily obfuscated, appears to contain text related to 'dog bite treatment guidelines', likely a lure to encourage clicks on the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gimoguvi.ru/strik?utm_term=dog+bite+treatment+guidelines+india PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/21806541-405d-4dd0-8892-f3b4e9738cbb/cuales_son_los_principales_alimentos_antioxidantes.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/56686818691.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/john_deere_345_parts_kijiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c120ff16-1703-497f-8c99-26cd99dbcf68/42709783260.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/79980936706.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/plant_high_school_tampa_football_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d662910e-1109-47bb-bdd0-714932bf8846/4_pics_mystery_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/43366211154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f74e0c9-7254-40cd-9f52-1015ec3c05a6/2008_dodge_avenger_computer_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1126445-92d4-4139-9901-4c21191f63df/why_does_my_weight_watchers_scale_keep_saying_error.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/moxujofomudetitiraxifozu.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/essential_oils_pocket_reference_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b26e79b-5ad6-4d51-8580-161b018c1d77/how_to_make_a_case_study_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/how_to_use_layers_in_photoshop_express.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e789e247-b4de-487e-8c16-6da2495c978e/70530505054.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/66139137627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de4c526-878e-4454-8f76-3c214f51284b/mcdonald_s_holiday_pie_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/durable_power_of_attorney_ohio_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/cabinet_ministers_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/neterugesikukopuxoroditep.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/33247805029.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/30654395974.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/xogilulixim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cf1b2a5-4389-438c-8c44-4b8771250a8d/die_kleine_raupe_nimmersatt_text_und_bilder.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4D 5164 bytes
SHA-256: 380322ce94b0bf316c9a417f3e4991006bacfbb6515029d20518935284227c1a
font_01_sfnt_off0000fdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 11128 bytes
SHA-256: 99f19c643cf5730a8d3d10de7e50a6328b9468cb999427456d4ec338139fa2f5
font_02_sfnt_off00012397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12397 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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