Malicious PDF — malware analysis report

Static analysis result for SHA-256 f496aa6b70a02f66…

MALICIOUS

PDF

79.8 KB Created: 2021-05-17 11:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9cb6645572cfb9aa13cd97faa8b49aee SHA-1: 8c30e261af6c5a87afa7d87cb7446e32ceee3884 SHA-256: f496aa6b70a02f663b1e59479b7da5c219085c29399d0c831d9626eece22d87f
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 0.9997

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://gimoguvi.ru/strik?utm_term=husqvarna+128ld+carburetor+high+low+adjustment PDF link annotation
    • https://cdn.sqhk.co/rabataxuvax/hejhgjN/livunegeta.pdfIn PDF document text
    • http://kittyplay.online/bubble_bobble_theme_sheet_musicdmdh7.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/0ihiejg/rounded_corner_rectangle_illustrator_2020.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/adobe_reader_9._5_free_download.pdfIn PDF document text
    • https://ziduxibuzogegu.weebly.com/uploads/1/3/4/0/134012824/ziwagagatewexo-wotuxunidone.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/hjihdhf/pixel_car_racer_mod_ios_download.pdfIn PDF document text
    • https://ramageputa.weebly.com/uploads/1/3/1/6/131637054/gamoj-dudez-fenefap-bazilakuzifod.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/egh6ibM/dwight_eisenhower_military_industrial_complex_quote.pdfIn PDF document text
    • http://bewilotaweje.mywebcommunity.org/51332773321.pdfIn PDF document text
    • https://gamitodotabezoj.weebly.com/uploads/1/3/1/4/131453651/7832911.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/rhjgdji/mindset_synonyms_or_antonyms_of_word.pdfIn PDF document text
    • https://cdn.sqhk.co/nubavojek/aiQHm1b/violet_aesthetic_quotes_tumblr.pdfIn PDF document text
    • http://ueuniti.xyz/attwood_tsunami_manual_bilge_pump9mz73.pdfIn PDF document text
    • https://cdn.sqhk.co/sofilita/ahhFieV/the_last_survivors_movie_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/zawileveruz/fjhidsW/49418841235.pdfIn PDF document text
    • https://cdn.sqhk.co/laratakidev/jaAgekR/gesatudoravixa.pdfIn PDF document text
    • http://baranaydin.org/59511656584bfqk6.pdfIn PDF document text
    • http://apelsins.space/63608459938na1va.pdfIn PDF document text
    • http://zetumitufam.mywebcommunity.org/mipaloxegodilujejumi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nerozufigepa.rf.gd/the_cat_in_the_hat_full_movie_dailymotion.pdfIn PDF document text
    • http://vuvagebarib.epizy.com/mozatavi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 6184 bytes
SHA-256: 3e7506585bf81838dbc4a83622225babcc7f0ad767249bae8da095740224b5ce
font_01_sfnt_off00010cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD2 10920 bytes
SHA-256: 69d8c3645ca4a91fd69b115d87c0d09139364b56115cb8d3d04416e982ea0866

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