Malicious PDF — malware analysis report

Static analysis result for SHA-256 8efac3eeae4a43be…

MALICIOUS

PDF

151.4 KB Created: 2020-12-20 19:15:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e7ae240aa624a902303067cf32c1e239 SHA-1: 72a9c122d6ea4b5d83949633feef9586e41eae4c SHA-256: 8efac3eeae4a43be6245245569800b5df71c0b65891d6c136c93596e4c0ec1f7
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 high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, consistent with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://traffnew.ru/strik?utm_term=problems+of+high+population+density+in+japan PDF link annotation
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/suzusaxipiguko-kiraxa-jawegut-suzumit.pdfIn PDF document text
    • https://morutasatosode.weebly.com/uploads/1/3/4/3/134366393/fosimixisedogepewoba.pdfIn PDF document text
    • https://zororoxuz.weebly.com/uploads/1/3/4/3/134309160/wirejuwewurewi.pdfIn PDF document text
    • https://tuwozuzoleza.weebly.com/uploads/1/3/4/5/134509843/gexefi-boripomem-gupuwude-wefizenet.pdfIn PDF document text
    • https://kizinuraximi.weebly.com/uploads/1/3/4/4/134446503/1e8e96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5f94a2b3b2d2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464083/normal_5fda3483ec9e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d52e76d-8c8a-44e9-abd9-57e509efc643/jurassic_world_evolution_dinosaur_compatibility.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ae84085bf90c0e029602/t/5fc2f9ec9ee0f32b87b5d9b9/1606613485662/lirafexipiwevirebilimeti.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/already_just_yet_exercises_with_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc566ac3dfdd95b60f3409b/t/5fd663aa102ca46975e33986/1607885739476/twitter_data_to_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/mod_apk_for_avakin_life_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/zelda_ocarina_of_time_apk_sin_emulador.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/true_caller_apk_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8de8249-4d0d-4428-9a55-bd33b9113743/94128998287.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/new_album_odia_song_free.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000196df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196DF 28416 bytes
SHA-256: 2c2d1d8e8cb8795be4240f6989f34b57daa4f9c6697fd1015424ef7045cbf7b5
font_01_sfnt_off0001efc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EFC8 5772 bytes
SHA-256: a33a0c0af3b9651da44c78f957b037e95fbce96ba6831530b44ad6d922d79b9d
font_02_sfnt_off0002034e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2034E 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_03_sfnt_off00020eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20EB1 11560 bytes
SHA-256: e0eefbfa156c38f390287157104bce9a07515208acad6afb3ecef801ad26e828
font_04_sfnt_off0002364a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2364A 7028 bytes
SHA-256: 7fa42ea075dec230e988e7954d53659d29916dc1ff4bb008bf546f41776bbb49

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