Malicious PDF — malware analysis report

Static analysis result for SHA-256 d579cf734ccae0c5…

MALICIOUS

PDF

73.7 KB Created: 2020-12-16 11:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f0dd6fac4299089429ce67dda08bc88e SHA-1: efcc6e17f394dc7c2c25681ead577ba6d3c88719 SHA-256: d579cf734ccae0c5be19520fab7cf50239bfe412eb8b7e2f6fe8606bea50dde4
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing a critical heuristic firing for a malicious redirector link. The embedded URL points to a known malicious domain, suggesting an attempt to lure the user to a harmful site. While no scripts were extracted, the PDF structure and the malicious link are strong indicators of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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=bleach+nemu+x+uryu+fanfic In PDF document text
    • https://xixemoxutosiseg.weebly.com/uploads/1/3/4/4/134473276/fb96ffeeced.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc27e0b2cf09257bd761280/t/5fd15eb1eeaf2774ac7ec45a/1607556785323/how_to_manage_a_business_effectively.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/lixadojodemake.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd439ee05dec705b14acff/1606239135256/prayer_rain_prayer_points.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c23fae-3569-4f6b-b060-9baf62998b7a/autocad_2007_tutorial_for_beginners_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/barakah_the_prince_mawazo_video.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/xozofoguzozix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0635106-8e61-475a-ba28-23d06fdb2dd9/building_electrical_wiring_diagram_symbols.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3a46c8139af037656512a/t/5fcfd7e338f37379df3b7a84/1607456740138/sniper_3d_mission_barricade.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/ginemawituvakejo.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/12102867093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85afbc4b-79b5-4132-8e5e-9b3fe8c2f39c/12384119686.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_off0000d601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD601 3588 bytes
SHA-256: 68753ae4e14197b1be5a54dcae694ac8f036940f0a8a5e4e810553bfa6f0276a
font_01_sfnt_off0000e2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B2 5160 bytes
SHA-256: cec55bfd423c1f845d594bb372faaf853a87a2ddbbe2c5ecb2f443000ee689df
font_02_sfnt_off0000f421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF421 11916 bytes
SHA-256: 1477bba350b412b00d7ee181512daf1e624549d086092f57d4cf9da93028a3db

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