Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7eb44700de9930…

MALICIOUS

PDF

94.5 KB Created: 2021-04-20 08:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ffd4bc802faae6ea6c66214ce17936c SHA-1: 7852327acb606092221896f7ed2c9a6bb6c5d090 SHA-256: 3d7eb44700de9930c7613dad50f4a94fe5c0daaf57bc42cca2e70edd09678d3d
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The 'SE_INVOICE_LURE' heuristic suggests a pretext for user interaction. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest an attempt to redirect the user to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://zajinet.ru/strik?utm_term=to+record+a+sale+on+account+the+company+should+debit
    • http://dommasters.site/gift_certificate_template_ukzbusc.pdf
    • http://winoxolupuvil.getenjoyment.net/57842680400.pdf
    • https://vopoxeja.weebly.com/uploads/1/3/5/3/135346001/c8be8a6f3a8.pdf
    • http://winclean-shop.space/sourate_ayat_al_kursi_traduction_francaiseui54.pdf
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/fepixonabevura-judiliwidirikar-sepani-zojuv.pdf
    • http://lobabinuladeri.medianewsonline.com/naligibarubuvopatejilim.pdf
    • http://mon-cmbretagne.best/the_scarlet_letter_oxford_free_downloadofs1z.pdf
    • http://powuvomewekuxeb.getenjoyment.net/apiculture_book.pdf
    • https://sidopaxabu.weebly.com/uploads/1/3/1/3/131398246/d74957.pdf
    • http://siwivelijutore.medianewsonline.com/muscle_building_workout_plan_for_beginners_female_at_home.pdf
    • http://fabujisaw.mygamesonline.org/logic_pro_x_score_editor.pdf
    • http://dehydratedoriginalgoodness.com/off_season_soccer_workout_routinektl8w.pdf
    • https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/9131551.pdf
    • https://fomimelagesuto.weebly.com/uploads/1/3/1/4/131406840/b74d8ee00d36d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vebogotexaf/format_citation_word_2013.pdf
    • https://fec450ea-b80f-4746-b851-35139cc02de5.filesusr.com/ugd/53a83b_664e6af5d71f4e13b917e31ca9dfe7b4.pdf?index=true
    • https://s3.amazonaws.com/kavugusepe/gunumanosirebixobutugapev.pdf
    • http://muvemaxadal.onlinewebshop.net/ti_ch_i_bi.pdf
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_79df2fb8c17b40fa9b9ff729cd22c51c.pdf?index=true
    • https://s3.amazonaws.com/xokebore/panasonic_kx-tg4011_manual_espaol.pdf
    • https://s3.amazonaws.com/wikurixobelu/28318988049.pdf
    • https://c9254e9e-0e71-498a-8384-ab4c929b52b4.filesusr.com/ugd/0699ff_96b692f8cfc8472bb6d2ba14c15eb832.pdf?index=true
    • https://s3.amazonaws.com/dikomavomem/zarawavok.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001304c.bin
5f7a055558ba48696801b8a91c4a339136dbe559015cb8a59948fedcd671d8eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1304C 5504 bytes
font_01_sfnt_off000142d4.bin
81f047eb98ab34c66307550a6538653702842f2dd9ab858b38c34840d7ddd26a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142D4 11540 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.