Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ee400c421fdcca…

MALICIOUS

PDF

87.6 KB Created: 2021-05-09 17:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1ec1cc907821f677008369006f9c89bc SHA-1: 20d07f501faf47b4d8b02da474f9c85170aac574 SHA-256: 84ee400c421fdcca35f69b9190874ce0334c04385b9e1836dfbd2322f9a48a91
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/strik?utm_term=aprender+ingles+escuchando+gratis+descargar PDF link annotation
    • http://tiwimifozukimu.medianewsonline.com/gabari.pdfIn PDF document text
    • https://pufoxedoj.weebly.com/uploads/1/3/4/4/134438994/2134793.pdfIn PDF document text
    • https://topudikuwem.weebly.com/uploads/1/3/4/0/134042537/8364451.pdfIn PDF document text
    • https://cdn.sqhk.co/felatadag/h3VaOt0/97123259934.pdfIn PDF document text
    • https://cdn.sqhk.co/sanojuxako/Pgehg3G/23343777290.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/8ac1170470d4d.pdfIn PDF document text
    • http://farunoraxukiz.getenjoyment.net/english_dictionary_download_format.pdfIn PDF document text
    • https://cdn.sqhk.co/besudamuge/jc88Zhf/hover-_1_transport_electric_scooter_amazon.pdfIn PDF document text
    • https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/popitaxidovinebil.pdfIn PDF document text
    • https://junimadegerozo.weebly.com/uploads/1/3/4/0/134096607/f007ba61b566.pdfIn PDF document text
    • https://cdn.sqhk.co/wenisuvuroju/iagfihL/sdgfp_leftover_deer_tags.pdfIn PDF document text
    • https://cdn.sqhk.co/tikalamin/AZX1iei/stumble_meaning_in_tamil_translation.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/xalexojaxipud/epson_powerlite_1761w_software.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/kangertech_evod_directions.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/wosekefivulume.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/wuzilepinoropige.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/niterikamokapu.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/one_minute_manager_in_gujarati.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF165 5208 bytes
SHA-256: 1fcb4de62efc83a2281784c127f180bed0b3f20c2ac43c0eff32bc3d75e60cbc
font_01_sfnt_off00010303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 12540 bytes
SHA-256: 6bb8f4ab2f287b3954e0881bb0d6e599c90211c25302459601fe5117153549a0
font_02_sfnt_off00012b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6A 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off00014098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14098 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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