Malicious PDF — malware analysis report

Static analysis result for SHA-256 730d85dbd001a63b…

MALICIOUS

PDF

116.9 KB Created: 2021-03-15 16:35:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 31d5f4d1891955bf7560939c3243dd8d SHA-1: 057e176d4feab4120fc99791067488a06e82950d SHA-256: 730d85dbd001a63bb5e59034c883d1a5ca851574efbe3a2fbbca11d27a9701dd
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with one notable URL being https://midufefew.ru/aws?utm_term=what+does+galarian+mean. The presence of a large number of external links suggests an attempt to manipulate search engine results or distribute further malicious content, aligning with techniques like Spearphishing Attachment if delivered as part of a campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=what+does+galarian+mean PDF link annotation
    • https://cdn.sqhk.co/lepudijazur/gOriizT/nexapavopogomuvavazevox.pdfIn PDF document text
    • https://cdn.sqhk.co/gatezoru/jcQmDic/40840941771.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/ibjehOm/gmod_gamemodes_for_2_players.pdfIn PDF document text
    • https://cdn.sqhk.co/lotivadafe/eghhjcs/69139550712.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/playing_the_queen_s_gambit_lars_schandorff.pdfIn PDF document text
    • https://cdn.sqhk.co/siwebove/ehijeST/desktop_wallpaper_animation_free.pdfIn PDF document text
    • https://cdn.sqhk.co/sagitusat/VVs4lif/b_k_shivani_lectures.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/NsT9idO/pool_pocket_numbers.pdfIn PDF document text
    • https://cdn.sqhk.co/zokosofu/MgjjfCD/red_sunset_maple.pdfIn PDF document text
    • http://lurubalopare.sportsontheweb.net/what_does_the_woodcock_johnson_iv_measure.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/aQTShaG/highway_crash_derby_all_cars.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/vavejijitatofu/pencil_sketches_easy_girl.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/70539394765.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/sinopsis_novel_hunger_games_catching_fire.pdfIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_b1afefe881b441b1b1a3d76d5ec5a276.pdf?index=trueIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_2f3c5679fff846afbdfab690e35c462f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/phonics_teaching.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/laduzalojimofowunosasodel.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/26842274165.pdfIn PDF document text
    • https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_b0302a2a0dec44dd8e4cfeecf9ea6554.pdf?index=trueIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_d7feb9f26b19473e92fbf1d39c816b95.pdf?index=trueIn PDF document text
    • http://kubomefewofumim.atwebpages.com/vogujufadamerobemor.pdfIn PDF document text
    • https://19a4122d-28db-4ec2-a9e3-8c1e87f24dd5.filesusr.com/ugd/70d0b7_e0f6d68a3fb74adfb92761058b8ed7c5.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_off00018ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AD2 5252 bytes
SHA-256: c97f454bf11992c03969e228477c7924ae359560d61d3077b925fd5a75333ae0
font_01_sfnt_off00019c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C92 11824 bytes
SHA-256: 709ead9a80b0030d921a7e7ddc5d795495e8ecc8d49479d1c80e0a29fc029b68

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