Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecfa80616eb17f4d…

MALICIOUS

PDF

70.0 KB Created: 2020-12-06 06:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 24842763f5f21359a0a35b91cc147589 SHA-1: 2fd4db1a07bd1d8f91e801a0b3be496bd8d49dc8 SHA-256: ecfa80616eb17f4d2959eebcdaa81d9ca4ce7df3136ea19490b75bb22b25c654
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains an external URI pointing to 'trafffe.ru', likely intended to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, contains text suggesting a lure related to a music file, which is then linked to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/123?utm_term=mary+j+blige+my+life+zip PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384461/normal_5f8de67380b7a.pdfIn PDF document text
    • https://sukanogijero.weebly.com/uploads/1/3/4/3/134333185/ragaditeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/gold_foil_experiment_rutherford_date.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/linear_regression_analysis_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/zofitogaxala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18991374-1f26-474a-ad94-0f60c0e20f02/73931443880.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/57876851124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfcc8ac7-5897-4507-9181-ca5a2ff1f482/mimsie_the_cat_hot_in_cleveland.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/55956288902.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/blizzard_launcher_ing_at_0_b_s.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/cds_2_2019_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/35132330014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d21b1bb-a836-425c-a0d0-8f68eb20c52d/wexakubidofeden.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC620 4908 bytes
SHA-256: b0a46a2b83ca6f7fa7cc2862242221f7b1324549c8b106e2a340c49eb840647e
font_01_sfnt_off0000d6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EC 11244 bytes
SHA-256: f1f24ed6777dd02902b9181223d53283d6ca93f71bb9392193025b9e01e474df
font_02_sfnt_off0000fd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD60 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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