Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d82bddcf1900b1…

MALICIOUS

PDF

68.1 KB Created: 2021-02-15 06:34:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 62846912e0c4292fcb3b1ed97060eeb2 SHA-1: 07f502fa22baf010f849bd26571d9451254e3237 SHA-256: 80d82bddcf1900b14490785d5c4be6073f1b3441062a6662f1b15d6236dc5d64
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which appear to be part of a link farm designed to attract traffic. The presence of a "download button" heuristic and a critical ClamAV detection for "Pdf.Phishing.Trojan" strongly suggests a phishing or malware distribution attempt. The primary malicious URL identified is https://baarspo.ru/aws.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/aws?utm_term=new+song+2019+tamil+audio++masstamilan PDF link annotation
    • https://bemezonef.weebly.com/uploads/1/3/5/3/135389856/viwamididuz-kujuzizizu-zisudu-vufen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_600ce9c6f2dce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_5fd354adad9ef.pdfIn PDF document text
    • http://orbitan.fun/3995836243232b8r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374366/normal_5fe461f6cca33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_6026b4608e949.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/GjjiiXN/red_vs_blue_zero_episode_1.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/lowebemuwojiso/conformational_analysis_of_substituted_cyclohexane.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/carbon_dioxide_properties.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/akhian_de_kol_song.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/atom_python_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/break_even_point_graph_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/langston_hughes_poetry_analysis_worksheet_answers.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_off0000bf5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5B 5476 bytes
SHA-256: ef512ac2cb170eec4ff3906ed30e388b5ea2c5d4a746f8aae1279750a00909c6
font_01_sfnt_off0000d1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FE 10416 bytes
SHA-256: 778c5a3c9a1fe9d4f71d2149141e499f2ee742bcb3646a8129714f93a79b303c
font_02_sfnt_off0000f5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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