Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d5334861e2aefc…

MALICIOUS

PDF

80.4 KB Created: 2021-03-17 02:58:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 85a846790a72c086fdd20a841f848fd5 SHA-1: 755891df6d31bac8af9fdd3256f55bdc8c7c2386 SHA-256: 70d5334861e2aefcb1a5c6ad7e4cc8222df0d6d32b903ceea3643644be95983b
186 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 0.9997

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://soxebez.ru/strik?utm_term=how+much+is+a+battery+for+a+2012+toyota+camry+hybrid PDF link annotation
    • https://cdn.sqhk.co/nimotixalulo/zvibPhi/dodejesivaru.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/HTiehaU/can_cats_eat_one_meal_a_day.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/O0Hjfia/sunshine_house_south_centennial_avenue_aiken_sc.pdfIn PDF document text
    • https://bawokuxuduxiv.weebly.com/uploads/1/3/1/8/131856062/wokubivexok.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/jibKMhg/91488645506.pdfIn PDF document text
    • https://wozexofinudere.weebly.com/uploads/1/3/5/9/135984457/nuwelupakis.pdfIn PDF document text
    • https://cdn.sqhk.co/zujagepax/zjajbgi/dejeripatadi.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/lukesewidi.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/djsihif/evil_sudoku_printable.pdfIn PDF document text
    • https://sikiroradimer.weebly.com/uploads/1/3/4/6/134619363/9dc8a.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/numegubowalonan/davis_drug_guide_tylenol.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/melaj.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_97cee877287b427494665465824379ad.pdf?index=trueIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_e487822bd6684d94bd6d4db06e53bcbb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/novifamigot/top_10_famous_film_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/grammar_and_spell_checker_software_free.pdfIn PDF document text
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_ffe60ba7ec5f4d87b52c6cb3dd02bb1e.pdf?index=trueIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_c435b8a87fcf4e478cb99f9c116baba3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/lakehead_university_outpost_hours.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/extraordinary_ones_heroes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/legilemufavajasawipezig.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_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 5852 bytes
SHA-256: 6d4d78925df5a6d8c9da7c6f156aa34688e75c682b9e1ffc615668f621082ec4
font_01_sfnt_off00010edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDF 10836 bytes
SHA-256: aa00ba7fd7402a48163faff5d89b459b35101196f8a23859e4050a9408b8dab4

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