Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e202fba0e477a1…

MALICIOUS

PDF

77.8 KB Created: 2021-03-28 17:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 943f8858af2dcc3139ae89149bcfa136 SHA-1: 87275a065d52e66f8526942f2d8027d9257bdd32 SHA-256: d7e202fba0e477a12c0d76620a886c9e9b4f0cfe843320e4148c831152d5ce69
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with the primary one being https://dafemum.ru/aws?utm_term=the+medium+is+the+message+explain, suggesting it's used to redirect users to a potentially harmful site. The PDF structure and embedded content are consistent with phishing or malware delivery tactics.

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/aws?utm_term=the+medium+is+the+message+explain
    • http://freud.icu/2748050541887of3.pdf
    • http://alkim.xyz/fight_club_2006_castx62yn.pdf
    • https://static.s123-cdn-static.com/uploads/4445106/normal_5fe14e3fe0466.pdf
    • https://static.s123-cdn-static.com/uploads/4488323/normal_5ffab03a7cd33.pdf
    • http://dezlice.ru/dogmatismo_vs_escepticismocfhgy.pdf
    • http://select-get.top/easy_piano_sheets_robloxpef4v.pdf
    • http://tesocoin.online/402044583929jqw2.pdf
    • https://cdn-cms.f-static.net/uploads/4419626/normal_600cf3f051154.pdf
    • http://islemleriniz.org/fibotizel0g9en.pdf
    • http://chelamela.org/fopevejuzexerehx0f.pdf
    • http://extraterrestrials.space/jidafipezurewedipixukifdetz0.pdf
    • http://reduslimitalia-official.site/gafexarofalelifewogukisk1j7j.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sewuxikamumo.rf.gd/75764930858.pdf
    • https://uploads.strikinglycdn.com/files/487846b1-254d-4d53-b1a7-8ddf286d18c8/28961609583.pdf
    • https://uploads.strikinglycdn.com/files/a86d8e35-6ab9-48be-91a7-fa1a13efb82e/what_is_ethical_decision_making_in_nursing.pdf
    • http://remofexemuja.rf.gd/classifying_matter_worksheet_answers_key.pdf
    • http://parubixus.rf.gd/what_games_are_on_xbox_one_atari_flashback_vol_2.pdf
    • https://uploads.strikinglycdn.com/files/1ee22959-dbba-43b9-867d-0c48a3b33245/how_to_broil_steak_in_air_fryer.pdf
    • http://rotodeperev.rf.gd/15969119616.pdf
    • https://uploads.strikinglycdn.com/files/e0bb83e9-6362-4458-9de1-40dbeb7b8989/how_to_learn_python_for_free_online.pdf
    • https://uploads.strikinglycdn.com/files/77584c53-e87a-48c4-95a6-98f6d02abd82/sixafepikelariliwuwadef.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ad.bin
72318c4cc7631c06d7139ec3e1216eb66361eac0a7112d3d883b694e85cb0614
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AD 5292 bytes
font_01_sfnt_off0001038c.bin
84a3655e7f7d0bb7d8c831720d03fa9cec7a5d628eb1265ec2fd9b20d753ba51
pdf-font-stream PDF embedded font (sfnt) at offset 0x1038C 10780 bytes