Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5da404c4d6f13e0…

MALICIOUS

PDF

74.7 KB Created: 2020-12-22 07:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bd4dc9c3ad4e720edbd0efc1b089b7f SHA-1: 5c96f83994b289587a26606dcd6d69202e0569eb SHA-256: a5da404c4d6f13e0b1826d2ef3ee51344cc8e9260255f42aeec79bda57131e8e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'Top kpop groups 2020' and authoring information, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/strik?utm_term=top+kpop+groups+2020
    • https://static.s123-cdn-static.com/uploads/4408594/normal_5fdf6e4ec9cbc.pdf
    • https://cdn-cms.f-static.net/uploads/4375206/normal_5f92941f7b5f5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/075660e7-75ad-4375-8938-00c3acbc4e68/abcd_movie_online_watch_in_tamil.pdf
    • https://static1.squarespace.com/static/5fc27b6fdf132613bbc7a91a/t/5fc3c0924f9837572052689a/1606664338851/first_internet_bank_reviews.pdf
    • https://s3.amazonaws.com/gagagakigibapo/79535058756.pdf
    • https://static1.squarespace.com/static/5fc5c98f6b97992eb57d115f/t/5fc768446beae4543165f0a1/1606903876908/66297163988.pdf
    • https://s3.amazonaws.com/tamobalasu/xowuvijefekosiguv.pdf
    • https://static1.squarespace.com/static/5fdc804350e6d73f00910ce2/t/5fdcd0bd956a4850fa3354de/1608306877851/mezugejes.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6a7f6457125654336849/1606380162263/rewriting_linear_equations_worksheet.pdf
    • https://static1.squarespace.com/static/5fc1dc54be9b693951118edb/t/5fc7188ebfb90028be49fda1/1606883471080/juicy_fruit_flavor_origin.pdf
    • https://static1.squarespace.com/static/5fc0e1448ef7301f8b1097bc/t/5fc202014f98375720264915/1606550020298/argyle_middle_school.pdf
    • https://s3.amazonaws.com/tawovojo/jimulul.pdf
    • https://s3.amazonaws.com/sepovutapakogaf/rukezetokoru.pdf
    • https://s3.amazonaws.com/remuv/m8_android_tv_box_remote_control_app.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d289.bin
918f2eaaa213cad52269490041c56c9e2cb2a231d9aa36b4a109569a43bc3cab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD289 4564 bytes
font_01_sfnt_off0000e20f.bin
7cd81da48aaa6dd7e8de027d154c3cac54cc15e3509c2da48772097502d580e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE20F 2096 bytes
font_02_sfnt_off0000eba7.bin
166032585595c951ae81354aaf67f039a615d93e2e823119f6a85c1c1120c3b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 10580 bytes
font_03_sfnt_off00010f83.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F83 4324 bytes

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