Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e4c8d20f6352eb…

MALICIOUS

PDF

105.2 KB Created: 2021-03-15 17:11:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8220b933558c834d88b2d5dd616d84b SHA-1: b589e1c28217f926a708110ca7801b58da146da0 SHA-256: 85e4c8d20f6352eb0b178ddc5caab681c1e3a22b01ff0cf99507d2ffca903d24
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'dafemum.ru' was extracted, suggesting the document's purpose is to redirect users to a potentially harmful site. While no scripts were directly extracted, the PDF structure and embedded URI are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/wix?keyword=naruto+alternate+universe+name
    • https://cdn.sqhk.co/pavuraxutem/jghetTQ/baaghi_a_full_movie.pdf
    • http://fosireditoj.mygamesonline.org/dosafizavomogexi.pdf
    • https://cdn.sqhk.co/wejupexuput/GDifhap/16222962394.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ff8b80d1-f1c4-4878-816e-03dbed2ba2e5/how_to_pair_skullcandy_speaker_with_iphone.pdf
    • https://uploads.strikinglycdn.com/files/3be62e4c-3196-4b88-a488-d2b96fdd814a/56982490284.pdf
    • https://uploads.strikinglycdn.com/files/da24037c-bd6c-4cf5-aba0-8125ab8e5933/what_do_you_mean_by_plant_physiology.pdf
    • https://s3.amazonaws.com/luborinizu/beats_by_dre_ml8v2ll_a_powerbeats_3_wireless_headphones.pdf
    • https://s3.amazonaws.com/werowibovezoje/burning_soulworker_not_working.pdf
    • http://zorikeroz.onlinewebshop.net/canon_mp240_error_code_e5.pdf
    • https://s3.amazonaws.com/wusigipufuvowix/gonivaruguzexobevopamoz.pdf
    • https://s3.amazonaws.com/zesotat/why_does_my_lawn_mower_not_start_when_warm.pdf
    • https://s3.amazonaws.com/bewibiwat/43437765855.pdf
    • https://uploads.strikinglycdn.com/files/80dd7be9-6fec-4ffe-a683-58d22b6f028e/warrior_cats_games_roleplay.pdf
    • https://uploads.strikinglycdn.com/files/685b1eb8-8313-49ab-b7fa-e445c48fb7d9/what_are_african_musical_instruments.pdf
    • https://s3.amazonaws.com/bajapovogam/roraludepiralikapid.pdf
    • https://uploads.strikinglycdn.com/files/af11d35e-526b-4753-a998-4f5706dea2b3/polopesesefafetegisafe.pdf
    • https://uploads.strikinglycdn.com/files/4a8c5500-b8c2-49fa-b695-3baae771171c/what_scares_you_in_life.pdf
    • http://fogokenum.onlinewebshop.net/belly_exercises.pdf
    • https://uploads.strikinglycdn.com/files/f25d92ce-8e51-4458-9067-df76a75daf71/gavez.pdf
    • https://s3.amazonaws.com/tabobujimo/wejokoro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f4e.bin
f7e021401e6bd16119c66a5bfd11ae9e95f436e2cc3e7732f187a8326835f9b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4E 14968 bytes
font_01_sfnt_off00016050.bin
edeb62cc5cc4f2de27b2fe32cedcb1e26d591274943599f4e1a5aaaa5e5e673c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16050 4860 bytes
font_02_sfnt_off000170ce.bin
c7be3fc23524b2b3a88fe4993a868300e550bf6af261338b92cf59b4112c2205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x170CE 11392 bytes

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