Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8389f23355e58e…

MALICIOUS

PDF

78.1 KB Created: 2021-03-29 02:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1d3a0a9ae7fad2bc46e5a3444a9376c3 SHA-1: 105c47e680f81de8b97ab793b900dd8fad511f56 SHA-256: fa8389f23355e58e5423c0854fa93bcff125396866d1c4b5af196f2c6e9c7683
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 0.9998

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://ponafet.ru/award?keyword=corporations+act+2020+pdf+2020 PDF link annotation
    • https://cdn.sqhk.co/pulisamog/hiehiIR/human_fall_flat_2_player_split_screen_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/gikiwifada/jfheigf/66423340819.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/fmZXR9v/cheat_sheet_meaning_in_french.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/kgjjiNM/polynesia_adventure_game_walkthrough_frozen.pdfIn PDF document text
    • http://loberas.22web.org/neverwinter_nights_2_casavir_romance_guide.pdfIn PDF document text
    • http://jowigosut.iblogger.org/zikizabakanogogadoku.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/gfYgfge/85365861976.pdfIn PDF document text
    • http://femofuwodirunik.22web.org/windows_10_power_plan_advanced_settings_missing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d09d6e-40ed-4ab3-ab24-b16b399e596b/sunbeam_heated_blanket_replacement_cord.pdfIn PDF document text
    • http://safodur.epizy.com/3896477910.pdfIn PDF document text
    • http://kezatafoxab.epizy.com/1047573174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a67640-94b3-4152-b1bd-55037a659b61/57885711737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c41f0f-58bc-408d-8710-bca25d61a82c/honeywell_t8000c_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/bali_spa_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c518dc2e-8378-45b9-8e98-2584e6fa9ab5/61334858430.pdfIn PDF document text
    • http://pulupalu.epizy.com/autopsy_forensics_guide.pdfIn PDF document text
    • http://jiboleramar.epizy.com/cholamandalam_claim_form_part_a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4592345-7bda-4ef8-a220-5f6da94f99bc/onkyo_tx-sr608_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/new_movie_2018_bollywood_video.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF000 5296 bytes
SHA-256: 573f0ec84ce6c24d1f76e81bea630c31a82d4907550ffccc15641020a61f3381
font_01_sfnt_off0001020a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020A 11864 bytes
SHA-256: e03447c3a3213c7396ee114bad8b8e99f570cc9e1e997f34effb6153f2d151df

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