Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc3cd57b4a5fd5f…

MALICIOUS

PDF

70.4 KB Created: 2021-02-23 15:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 92bd8101365a4a690ec460bfbde3811d SHA-1: 6b7839d5d9754064a9214c4230132e043b74f0dc SHA-256: dfc3cd57b4a5fd5fe8b00ae6f1cb83889640552c5ee925f468aa0eb938edbe7a
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=aprilaire+thermostat+manual+8600 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476002/normal_60000518c8375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_5fea377fc6601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481161/normal_6029372a2a7ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_600ce29b7b71a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460243/normal_601740d914b06.pdfIn PDF document text
    • http://goldstein.capital/2_player_games_unblocked_fighting2h1x4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417414/normal_600f95e4dfde7.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/geometri_antrenman_kitab_23vpr6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488116/normal_602ea11417e6b.pdfIn PDF document text
    • http://copyright-rules-help.com/raymond_pozo_mayra_pinalesyue6m.pdfIn PDF document text
    • http://fragcups.com/cantina_song_piano_sheet_musicgnx3j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/jifupufibu.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/infinitives_and_infinitive_phrases_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/3101931070.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/caustic_ingestion_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/galorujosupunoz.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/kufufazozopopopiduzaf.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81B 5540 bytes
SHA-256: 90263e8b88103af3d3c8dba04bd2bbcbfe16b1da2da9829552f6493bbc94a85c
font_01_sfnt_off0000dab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB0 6148 bytes
SHA-256: 0b8363bc9e07cf89205331d27bc1c31e4fc91592bb846ce71245372e642e4983
font_02_sfnt_off0000ea8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8F 9848 bytes
SHA-256: 1c419d650007e365019f41e8f8470f062922903783e0f9edeb5891b080bf9d32