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) First seen: 2026-06-04
MD5: 3ffd4bc802faae6ea6c66214ce17936c SHA-1: 7852327acb606092221896f7ed2c9a6bb6c5d090 SHA-256: 3d7eb44700de9930c7613dad50f4a94fe5c0daaf57bc42cca2e70edd09678d3d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, with a significant heuristic firing indicating a link farm designed for SEO purposes, pointing to a redirector URL. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 PDF link annotation
    • http://dommasters.site/gift_certificate_template_ukzbusc.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/format_citation_word_2013.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/57842680400.pdfIn PDF document text
    • https://vopoxeja.weebly.com/uploads/1/3/5/3/135346001/c8be8a6f3a8.pdfIn PDF document text
    • http://winclean-shop.space/sourate_ayat_al_kursi_traduction_francaiseui54.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/gunumanosirebixobutugapev.pdfIn PDF document text
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/fepixonabevura-judiliwidirikar-sepani-zojuv.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/naligibarubuvopatejilim.pdfIn PDF document text
    • http://mon-cmbretagne.best/the_scarlet_letter_oxford_free_downloadofs1z.pdfIn PDF document text
    • http://powuvomewekuxeb.getenjoyment.net/apiculture_book.pdfIn PDF document text
    • https://sidopaxabu.weebly.com/uploads/1/3/1/3/131398246/d74957.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/muscle_building_workout_plan_for_beginners_female_at_home.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/panasonic_kx-tg4011_manual_espaol.pdfIn PDF document text
    • http://fabujisaw.mygamesonline.org/logic_pro_x_score_editor.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/28318988049.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/off_season_soccer_workout_routinektl8w.pdfIn PDF document text
    • https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/9131551.pdfIn PDF document text
    • https://fomimelagesuto.weebly.com/uploads/1/3/1/4/131406840/b74d8ee00d36d.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/zarawavok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fec450ea-b80f-4746-b851-35139cc02de5.filesusr.com/ugd/53a83b_664e6af5d71f4e13b917e31ca9dfe7b4.pdf?index=trueIn PDF document text
    • http://muvemaxadal.onlinewebshop.net/ti_ch_i_bi.pdfIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_79df2fb8c17b40fa9b9ff729cd22c51c.pdf?index=trueIn PDF document text
    • https://c9254e9e-0e71-498a-8384-ab4c929b52b4.filesusr.com/ugd/0699ff_96b692f8cfc8472bb6d2ba14c15eb832.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_off0001304c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1304C 5504 bytes
SHA-256: 5f7a055558ba48696801b8a91c4a339136dbe559015cb8a59948fedcd671d8eb
font_01_sfnt_off000142d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D4 11540 bytes
SHA-256: 81f047eb98ab34c66307550a6538653702842f2dd9ab858b38c34840d7ddd26a