Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c974118d1c688c…

MALICIOUS

PDF

100.4 KB Created: 2021-01-02 13:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1c07f4e98d86f7b58fff8e980fb11d8f SHA-1: 23abac1072873690decabd74cc0c586e8a86e7cf SHA-256: c1c974118d1c688c1e4dc28ae3c5184ef5f4b23a7c45065d095ecdfdc6769dbe
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is disguised as a document about Linux shell scripting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/aws?utm_term=linux+shell+scripting+basics+pdf In PDF document text
    • https://tevigopodasipa.weebly.com/uploads/1/3/4/6/134678542/luxulu.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/jjaDgiO/elements_of_design_definition_texture.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/fehgtjh/54074057627.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/jjnfijX/tone_generator_application.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/W9EVvuE/pevejakavamexolajawosadek.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/UzMo8f8/color_by_number_for_adults.pdfIn PDF document text
    • https://fikupekuxugo.weebly.com/uploads/1/3/4/6/134612485/pupaletidafo_kunovelem_lipibot_murajukupifetom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/36044720764.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/amona_tete_wa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e263a10-5b87-46d1-b8d6-63266968e7cb/29993311536.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/anonytun_pc_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/71026835930.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/happy_new_year_sheet_music_piano.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001497b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1497B 5568 bytes
SHA-256: 2943d227b2c81d70cc380bf52144f6e8461c65bd92044c935ce0207eab50cb30
font_01_sfnt_off00015c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C66 11720 bytes
SHA-256: 7a67e2d02ab18103761063433ac9d1b263f1e8bfa0fb6990ec829fb5ac8ab557

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