Malicious PDF — malware analysis report

Static analysis result for SHA-256 381c92aab9b2c2dd…

MALICIOUS

PDF

73.2 KB Created: 2021-02-11 16:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ac2685fe859c84cc5f4f4fda316528bf SHA-1: 4c7d79705bda88911762fd83cb4eeb8688727008 SHA-256: 381c92aab9b2c2dd59240f6a49cba9669c075936fe3bc86c4fa262a980e5e521
176 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://jacksth.ru/wix?keyword=how+to+refinish+gun+stocks+with+tru+oil PDF link annotation
    • http://losqutoq.online/60076076534vkg3v.pdfIn PDF document text
    • http://hookup153.fun/turikir0u20i.pdfIn PDF document text
    • http://erogan24.website/28922083234hb3o2.pdfIn PDF document text
    • http://arevakar-travel.com/dosurifepogidulugatogetupthwlb.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/HhQVPhh/91647534223.pdfIn PDF document text
    • http://beststudent.fun/bwise_grc_platformyv0i1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462379/normal_6009ed02d8460.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/fjfhiji/ddpai_mola_n3_sd_card.pdfIn PDF document text
    • http://gufutaca1.xyz/45021594531zo2nr.pdfIn PDF document text
    • http://canonsburglake.com/46087307801id92z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/turip/mystic_messenger_writer_email_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/circle_sticker_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/akeli_bazar_jaya_karo_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/34387197465.pdfIn PDF document text
    • http://wuzazuj.rf.gd/aniara_poema.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/aadat_remix_song_sucha_yaar.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_off0000e327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE327 5048 bytes
SHA-256: 28467efeba4328b1e723d67f2c689b8deecf83d1ef90aeff9d2162ffeca275b0
font_01_sfnt_off0000f46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46B 10212 bytes
SHA-256: 1d283350631d3a152f5ba0aa1df2d34c385295f37faf16990df648b42e31a38a