Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5018f8e3985e445…

MALICIOUS

PDF

78.0 KB Created: 2021-03-05 20:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e7280c055814bab618e538337b0b89dd SHA-1: 994d0381dd2904176419d4a6f37e8475e616aba9 SHA-256: c5018f8e3985e445f438925aae88ecc5793ee2f9e055a0b43f46732a4c90b195
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wb?keyword=human%20anatomy%20and%20physiology%20lab%20manual%20exercise%2011%20answers PDF link annotation
    • https://cdn.sqhk.co/kisasizaro/j3ihyhj/xibejezanad.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/electricity_and_magnetism_worksheets_8th_grade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408987/normal_5ff0089ab59fb.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/90550519528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_5fe938c44df8a.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/6xAibij/25905564498.pdfIn PDF document text
    • https://cdn.sqhk.co/julubesaf/cggAyHp/airport_operations_control_centre_job_description.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/O9rmhhj/24472433379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474719/normal_60281d561e9fb.pdfIn PDF document text
    • https://cdn.sqhk.co/gikokimofegi/VdnCCjb/popular_ringtones_2019_mp3_download.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/185bc463-59ef-4e45-8f83-36d0a38bb1dd/85927803245.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/car_game_apk_app.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/urbanears_plattan_2_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/apache_jmeter_3._3_jar.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/action_point_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/how_does_the_linux_kernel_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa0496d9-68c1-4ec1-b957-5ed1e4e2ed4e/where_is_the_power_steering_pump_located_on_a_2007_pontiac_grand_prix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe1a97b-79b2-42cb-8b25-7612a2ce2b7a/52000682838.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/anjaana_anjaani_video_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/214cebef-f98e-4474-bb3d-d50556c3e68d/constitucion_mexicana_articulo_113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c653891-676f-4d4e-ab11-360a243a3641/what_is_on_the_paleo_food_list.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF390 5900 bytes
SHA-256: a9995e4f3189683a1ef2b0bbdff2e60b7280caf5dd8cec0f87018591c4977902
font_01_sfnt_off0001079b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079B 10216 bytes
SHA-256: c12949ad69244a796cd190b284c52e391ad60066f3515bf7f8357c6eb24d4602

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