Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fbd1ef9bd45eb7…

MALICIOUS

PDF

78.3 KB Created: 2021-03-15 18:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 45f409b112800dea480ca79188109c0a SHA-1: bb20d529186b27a26fcb0f1b9446472399e5c5b7 SHA-256: c6fbd1ef9bd45eb7acf30608ee7639be466982a1f6123aaed326373a1cd5b995
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, indicating it functions as a link farm. The primary URL observed is 'https://gimoguvi.ru/strik?utm_term=how+do+i+make+a+lady+fall+in+love+with+me', which suggests a phishing or scam-related lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/strik?utm_term=how+do+i+make+a+lady+fall+in+love+with+me PDF link annotation
    • https://zodukaveg.weebly.com/uploads/1/3/5/3/135345947/wawimo.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/Hcieehj/modern_age_furniture.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/6933636.pdfIn PDF document text
    • http://axacheat4.xyz/10950908528wilm3.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/3gieLsW/cut_the_rope_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/78jbIi5/water_marbling_backgrounds.pdfIn PDF document text
    • https://pugewolusaw.weebly.com/uploads/1/3/1/4/131453132/5583993.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/aZHhiiR/cnc_calculator_app.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/idjjWjc/31091737391.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/NegdjgT/ground_operations_jobs_manchester_airport.pdfIn PDF document text
    • http://erogan-encolumbia.site/how_to_enter_gerudo_town_breath_of_the_wild19mtp.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/avK0RFa/julewob.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/gdwjdt4/49569577166.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/FgfLrur/xelekomuxozed.pdfIn PDF document text
    • https://fixaporaxaju.weebly.com/uploads/1/3/1/4/131413905/juzejalawixosim_wozob_gajuti_kafisu.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/Ijhfahi/fruit_ninja_3d_apk.pdfIn PDF document text
    • http://mynasert.online/i_dreamed_a_dream_glee_sheet_musicm75e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f7690f66-1871-4559-97e0-239dee5b15da.filesusr.com/ugd/d2cc1f_102ba7780fbb47ab94ccfc9942e4339f.pdf?index=trueIn PDF document text
    • https://110e4d57-0078-4740-85eb-c883b260ab93.filesusr.com/ugd/d55797_f4a02c8d692d48db893db369e68cb4d9.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_637e8eef01454a7abdb942be0acba359.pdf?index=trueIn PDF document text
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_f0a945f3bf204c30a0b8f1b7e231b02b.pdf?index=trueIn 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_off0000f4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D8 5152 bytes
SHA-256: 80c6a32939ca503ec7690acd2c26d303b5e4fbf05c7c5fa27be6caa3e5139090
font_01_sfnt_off00010659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10659 11048 bytes
SHA-256: 96be17bd686242ce328e6abcdff3866e1fb8324df31bb216a100e5f3e8895112

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