Malicious PDF — malware analysis report

Static analysis result for SHA-256 18f34ed076d9a6b2…

MALICIOUS

PDF

74.5 KB Created: 2021-03-04 00:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 82342e536a194fe3e7d3b73e3a937cae SHA-1: 73d3703521e95c722c4856e1edd6a37b08856da2 SHA-256: 18f34ed076d9a6b2c99ebacf67d1e649250426bc069750dbb7ddfe2e51c0dd16
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to 'dish network contract' searches.

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
  • 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://bologen.ru/strik?utm_term=does+dish+network+have+no+contract PDF link annotation
    • http://labiosdewonda.com/29070209540udth3.pdfIn PDF document text
    • https://cdn.sqhk.co/kitijorawul/jcrniLA/random_royale_real_time_pvp_defense_games.pdfIn PDF document text
    • http://qupieasy.online/bafisivafegexinunuz3uijy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_5ff828c88acfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370780/normal_5fcb6ea989257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448345/normal_60400ad2ea29e.pdfIn PDF document text
    • http://cardioactiveuficiale.site/how_to_close_a_polaroid_600_land_camera_1000azzm7.pdfIn PDF document text
    • http://modozadubop.mywebcommunity.org/22357276760.pdfIn PDF document text
    • http://maxobujixeweden.sportsontheweb.net/sowixuligosegoponesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413987/normal_5fe8c522c9bd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427085/normal_5fdd319ba9823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485703/normal_60316fae2bcf5.pdfIn PDF document text
    • http://dle-tpl.site/loraxovrpb.pdfIn PDF document text
    • http://jexekiraj.sportsontheweb.net/73673004136.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387061/normal_5ff189bdc01dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384039/normal_5ffea80a2b8d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451549/normal_5ffb05de410e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406169/normal_6029604a60cb2.pdfIn PDF document text
    • https://cdn.sqhk.co/sowodopevew/mEibGja/best_paid_photo_vault_app_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE654 5208 bytes
SHA-256: 526485facef525badf1c51c61243f83b01cdeffcb694f23cdf853a7408647419
font_01_sfnt_off0000f824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF824 10788 bytes
SHA-256: 50256c213bc10a1aa00e7dfe1b611e2e83c5d76fec6e4d1451ed5912291d1441

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