Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd85e9cbfd4e5fe8…

MALICIOUS

PDF

81.2 KB Created: 2021-03-14 12:06:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65992c9175df2d7e1f0bfbf72e62dd90 SHA-1: 2b47e725a8fb87fa34e67918ec519b772508f719 SHA-256: cd85e9cbfd4e5fe8bc93bd93fcfafc82a6ab9e2f1b3ca3f1573eac3d2f189414
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that, when accessed, likely leads to the download of a malicious payload. The document body, though heavily obfuscated, suggests a lure related to interview questions, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/award?keyword=star+behavioral+interview+questions+and+answers+pdf
    • http://kirudikegopoded.sportsontheweb.net/types_of_isomerism_in_coordination_compounds.pdf
    • https://cdn.sqhk.co/lokiwejawe/dbhapZu/11044121400.pdf
    • https://cdn.sqhk.co/xarozowuzosa/xgfhcgi/fake_caller_application.pdf
    • http://mazoxobiziwikut.iblogger.org/61937359278.pdf
    • http://gatowixipeba.mywebcommunity.org/91066027794.pdf
    • http://kesevosidavob.22web.org/pajevarukuxirukusadasuvuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/47085ffc-d8a2-4ec0-8267-1cb0c7f64d03/wimil.pdf
    • https://uploads.strikinglycdn.com/files/86f15474-8ca4-414d-b959-8f8c6ddb971b/munokimapudoxulepugapiwij.pdf
    • https://uploads.strikinglycdn.com/files/07499629-e0f8-4bab-87b1-e3eeaf75f1d9/10645884043.pdf
    • http://zofududa.rf.gd/81446822010.pdf
    • https://uploads.strikinglycdn.com/files/12f3258c-6972-453c-b3c6-8f4c08f6c8ef/81724386512.pdf
    • http://jasukapikubov.rf.gd/kagivibubafazet.pdf
    • http://difafoj.rf.gd/roland_td-6v_review.pdf
    • https://uploads.strikinglycdn.com/files/71ef82fc-c64a-4cd1-b76d-688979a67a82/chick_fil_a_breakfast_filet_nutrition_facts.pdf
    • https://uploads.strikinglycdn.com/files/e9807df0-c0c1-46ce-8669-6b48dab3a5ce/what_kind_of_cream_does_dunkin_donuts_use_in_iced_coffee.pdf
    • https://uploads.strikinglycdn.com/files/46eb5218-c61d-4993-936a-23bc9118ed20/diccionario_espaol_portugues.pdf
    • https://uploads.strikinglycdn.com/files/fa53a0a2-9ce1-4b96-b95d-1924c5c75c33/where_can_i_get_my_bose_wave_repair.pdf
    • https://uploads.strikinglycdn.com/files/33ee5ef4-93b4-4ce6-bf21-2acee41ecf38/59656350268.pdf
    • http://wazewatiduxuz.epizy.com/92963417050.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_off0000ff1f.bin
88ef5cb79814a9c8a929bd638054f0c82f23623c9a38760124352afb6900b36f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1F 5652 bytes
font_01_sfnt_off00011261.bin
6525aabd9847ec2541a4a09dda920cfba811e4b0a9610a9a2e61344f3dc312a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11261 10980 bytes