Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb22b4461159f9cd…

MALICIOUS

PDF

60.9 KB Created: 2020-12-23 03:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 552103e74ba0487177056c60569aa90e SHA-1: 772b7b6dfebd5472c8b93c2b00f9fb59e7d25b72 SHA-256: cb22b4461159f9cdfa34771ebb9a369e46ff94b29f6bcba21ea1848dfc0155ff
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=omron+bp785n+10+series+price+in+pakistan'. This, combined with a high ML score and ClamAV detection, strongly indicates malicious intent. The document body is heavily obfuscated, but the presence of a malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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/123?utm_term=omron+bp785n+10+series+price+in+pakistan In PDF document text
    • https://static.s123-cdn-static.com/uploads/4371272/normal_5fcc6af715fb7.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/1536721c1fc1ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_5f95f338425be.pdfIn PDF document text
    • https://pojamemurix.weebly.com/uploads/1/3/1/4/131408024/jarotidex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449192/normal_5fba78ae1fa20.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/varolexexus/jurnal_agama_hindu.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/world_sport_stream_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/dapt_after_cabg_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/free_anatomy_for_sculptors.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/habitats_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/time_management_schedule_template_weekly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d86178-4a73-4961-b995-6ab969332077/25697776534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8356b64-958b-4c3e-871b-345148acd6ba/bavasuvufebobuxil.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/swamp_thing_series_2019.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_off0000af7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7D 5868 bytes
SHA-256: 767ea5abeb0a48f4cc55849c07820bac4c4816df8d632f3c305740932ac483aa
font_01_sfnt_off0000c36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC36F 10356 bytes
SHA-256: 9b0521ec5a3dc94e8f3ed56ded0415a544ccc7dfb26bd7021887cac2b1ff7167

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