Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae39319f017562bf…

MALICIOUS

PDF

78.6 KB Created: 2021-04-06 05:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 18c1c2b628e2201fed2a0fcfe5bdd32b SHA-1: 5215033d05baee6072af30a10d454c45e0832f02 SHA-256: ae39319f017562bfaa9278379267e60cace591a1db375aa5d01bb860ec3dd91a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://nipisod.ru/strik?utm_term=church+trustee+duties PDF link annotation
    • https://cdn.sqhk.co/xafiguzi/XehsrIG/35070801429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_5fd3a1e38ec71.pdfIn PDF document text
    • https://xefujalebide.weebly.com/uploads/1/3/2/6/132681694/03dfcc964f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446038/normal_601c03f389e9f.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/nj3hejd/the_world_of_magic_leveling_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450641/normal_600f1996919b7.pdfIn PDF document text
    • https://tizijepen.weebly.com/uploads/1/3/4/2/134234944/gudesajazugof.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/fSagfhe/griswold_christmas_tree_on_car.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481411/normal_5fe8fa03a134f.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/jCgedfk/siren_sound_ringtone_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/bnbQ3ge/world_of_kings_best_talent_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pinakebe.rf.gd/adobe_photoshop_t-_shirt_design_template.pdfIn PDF document text
    • https://8a05da06-75fd-4b4b-8779-f7668a2fa4a0.filesusr.com/ugd/da32d9_2afe5bd9c63c4e6dbb069a9e8f6880d2.pdf?index=trueIn PDF document text
    • https://107a3552-ed21-4f5d-95e3-510b6eae4444.filesusr.com/ugd/21bbef_2d0096900cab42f486e71ce967571f77.pdf?index=trueIn PDF document text
    • https://a7176590-a44a-43b4-8b25-1171fb6190ac.filesusr.com/ugd/e6ccb8_f71bfc6f4f8b46a8ae0f884edfa494fb.pdf?index=trueIn PDF document text
    • http://zosuvupetod.epizy.com/lotelesototasimegadu.pdfIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_2ad9ece16a7c4ba88e6bcc0841abe70d.pdf?index=trueIn PDF document text
    • http://dikedelunok.rf.gd/datamax_i_4208_out_of_stock_error.pdfIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_dfb743f3c4aa4e27b9316bc4741f7a27.pdf?index=trueIn PDF document text
    • http://fujafinu.epizy.com/sefudomevadozeduxetizepe.pdfIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_ac474339cf9747a1992094c3e2abaa2b.pdf?index=trueIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_5d54355ea6b643639d70bc28e0d1008d.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_off0000f8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C1 4692 bytes
SHA-256: 7ceb0000e5d09ff3e1665515fe2e3e1b5df6c43e0d4322da223fdf105f860c43
font_01_sfnt_off000108a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A9 10564 bytes
SHA-256: a0e850259879b85b9359e7ed9d8ef80578a0f10f9e69c91fbc024c49b272514c

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