Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a999bba41f2a067…

MALICIOUS

PDF

77.7 KB Created: 2021-03-15 09:38:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ab26a1275b5f9ace6fbf26b2acf384e6 SHA-1: 28f481b059a69460995a98ff9400ed5c06eb921e SHA-256: 7a999bba41f2a0678eac41e7d651c7667145a0fc8019e8419c13a7ce08b0c617
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and heuristics indicate it uses an image lure linking to an SEO redirector for a free download. The embedded URL 'https://druttle.ru/wix?keyword=nostalgia+kegerator+manual+pdf' is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the overall pattern suggests a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=nostalgia+kegerator+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489607/normal_603a75ee90876.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/pxhggcN/android_tutorial_video_free.pdfIn PDF document text
    • https://cdn.sqhk.co/babijuvawov/6hb7QXU/33828279290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_60311263ba6b2.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwiketi/hdGbSoO/flower_shop_careers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_6044f5daa595f.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/GhfEaWL/32350380403.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5ffc368ea47f1.pdfIn PDF document text
    • https://cdn.sqhk.co/zafowavo/bthiN5k/gejududoxoxeseba.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/dgfRacM/fonts_for_iphone_and_android_www._fontskeyboard._comq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_601da1c12eada.pdfIn PDF document text
    • https://cdn.sqhk.co/luvafuza/igjihje/jaxewifumulop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_601ed097ad4e4.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/PjbEZtb/how_to_use_the_crafting_table_pocket_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zalupadinukoz.rf.gd/77928205776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb33388d-33fb-4729-93bd-0b64c0e1c02c/resumen_del_libro_conde_de_montecristo_por_capitulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ecc000e-c309-4c18-915e-362a8b1b9a8e/20134837161.pdfIn PDF document text
    • http://wosunitiguzivef.epizy.com/biochemistry_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b900430-6455-4676-94c3-f72b965f22c7/gazojovugoxobonojugubedot.pdfIn PDF document text
    • http://zemadepa.rf.gd/joni_mitchell_big_yellow_taxi_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58dbf10-2dfa-4d85-a21d-1e6a0796e0ea/mudotugomerowome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10bfec1-b91f-415f-9fdf-7d931ffb544c/cub_scout_webelos_meeting_plans.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_off0000f13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13A 5396 bytes
SHA-256: 629fddc64496dbe25810b6515d7e7861564867247d39c558efb978cd0a593ecb
font_01_sfnt_off00010387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10387 11252 bytes
SHA-256: 266183f6f5104af8677861a6e0e3d47dbe4b6c54ea549f2d16d76d2589ba7879

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