Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49b30a7c94e0a41…

MALICIOUS

PDF

68.4 KB Created: 2021-03-07 15:26:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6121de8b91ca216d19aabb1248e455f0 SHA-1: 5b84ddeb0ad9c67be3f0f21801ad701ee772b457 SHA-256: d49b30a7c94e0a41612b17657106c203adc0e4cc23c92f85f7b7d36048004fa0
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 0.9998

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://midufefew.ru/strik?utm_term=ktm+1090+adventure+user+manual PDF link annotation
    • http://arfesopt.com/android_textinputlayout_error_paddingjlrkr.pdfIn PDF document text
    • http://indital.space/891478099928jhn6.pdfIn PDF document text
    • http://rakadan.sportsontheweb.net/how_to_reset_steps_on_omron_pedometer.pdfIn PDF document text
    • http://50offstore.pro/16940126173mt91x.pdfIn PDF document text
    • http://m-ryanaf.site/apc_smart_ups_2200_battery_replacement_part_numberk2zgw.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/hcvghhe/smart_uae_wallet_app.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/logo_design_contest_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/jcdghgg/border_security_officer_wage.pdfIn PDF document text
    • http://tefulen.iblogger.org/axios_post_data_x-_www-_form-_urlencoded.pdfIn PDF document text
    • https://cdn.sqhk.co/punipopi/niglbic/gizewazofofini.pdfIn PDF document text
    • https://cdn.sqhk.co/jumosanex/hWjbnkt/gutumifowazi.pdfIn PDF document text
    • http://gebikomuxe.getenjoyment.net/what_can_you_do_with_a_2000_watt_generator.pdfIn PDF document text
    • http://ranking-se.com/sovubevaxozivexugokixkcw.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/gi5ghih/24270260605.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/gdgjhdq/buxubifosuruzedu.pdfIn PDF document text
    • http://latitekiwa.scienceontheweb.net/beatles_sheet_music_piano_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_94410f2858d44303ae217276947b58e4.pdf?index=trueIn PDF document text
    • http://wimidisa.epizy.com/14634126877.pdfIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_bbdb2976f23c42fb99d41ef6b11dff4a.pdf?index=trueIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_af95092a0a6d4a74bb308561c60a805c.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

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_off0000ce4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4A 5352 bytes
SHA-256: 713e947bc004743244dec9d06b2f49c15ae677e381bc9cff7f12ca6ddeba6fd4
font_01_sfnt_off0000e075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE075 10504 bytes
SHA-256: 927f58030a487fa6657e49f551845cceb8d2c172111133f5c6f7d6a88a5ebbac

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