Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd163b96675a4820…

MALICIOUS

PDF

76.7 KB Created: 2021-03-31 02:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 589dd6ea7a42749c7f7407ec2e63fe33 SHA-1: 7cd0dda8d1ed6268878c515c53b4008246e841a7 SHA-256: dd163b96675a4820231f486bbd68baafc470af598cc1bdf59a0a7656f5b4a37d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing campaigns. While no scripts were explicitly extracted, the presence of embedded URIs and the ML/ClamAV detections strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/123?utm_term=aeroplane+hd+photo
    • http://limigulel.iblogger.org/sangharsh_bhojpuri_movie_3gp_mp4.pdf
    • https://cdn.sqhk.co/balemarize/ujdTjht/printable_coloring_sheets_of_dinosaurs.pdf
    • https://cdn.sqhk.co/buwozumu/hdL4jj9/65029716303.pdf
    • https://cdn.sqhk.co/madufuxenuw/9dihCr7/tiptop_esl_ltd_job_review.pdf
    • https://vabekozel.weebly.com/uploads/1/3/4/4/134487462/4941443.pdf
    • http://ramuwesitavoz.mywebcommunity.org/78047778473.pdf
    • https://senajadodum.weebly.com/uploads/1/3/1/3/131379015/pidumado.pdf
    • https://pigudoxuwupif.weebly.com/uploads/1/3/1/4/131437670/norepi.pdf
    • https://mirajaxudedina.weebly.com/uploads/1/3/0/7/130775596/6717546.pdf
    • https://cdn.sqhk.co/nifijagik/OjYVibH/p_bandai_usa_coupon.pdf
    • https://torimavilok.weebly.com/uploads/1/3/5/9/135984964/nibowudot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0627bad2-7e7c-4c5a-a7d0-89302372cc64/65253740281.pdf
    • https://uploads.strikinglycdn.com/files/0887f439-3026-4287-b7d3-027c98f3c7c5/joe_vitale_jr_musician.pdf
    • http://jufazireti.rf.gd/ahir_image_hd.pdf
    • http://wozojatoxako.epizy.com/tesasaxokonawarifatik.pdf
    • https://s3.amazonaws.com/zodawanuror/46299840501.pdf
    • https://uploads.strikinglycdn.com/files/795f8a2c-7b17-4d2e-9684-0e578d0d366a/what_grade_is_amc_8_for.pdf
    • https://s3.amazonaws.com/luworizesupox/animal_husbandry_project_report.pdf
    • http://rovizomaguwex.atwebpages.com/gumuvolutareg.pdf
    • http://tatatomoti.rf.gd/a_whole_new_world_chords_piano.pdf
    • http://wazeniwemir.onlinewebshop.net/area_of_combined_shapes_worksheet.pdf
    • https://s3.amazonaws.com/likerajatob/zanonoferelavafogas.pdf
    • https://uploads.strikinglycdn.com/files/5e3fafec-4eed-4db0-8794-7db345a1613d/speakeasy_bar_names.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d921.bin
672d0f0a395dbfa624f9698d92826572e3b94ca21c398fcd0ec59e7fc2ec21d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD921 4860 bytes
font_01_sfnt_off0000e99b.bin
d475746a9fbc99a75c0828ab0d58b4886a856d88606ac048bccefa0188188389		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE99B 10664 bytes
font_02_sfnt_off00010e2f.bin
4682c26c3398e28e532f85c15fa672ca36b531334aec60cec10ff3fa8474e720		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2F 16312 bytes

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