Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a87a3ee7f6287e…

MALICIOUS

PDF

106.9 KB Created: 2021-03-25 01:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a5b8475119ca41360fe9297ea6dd5e30 SHA-1: 27ff5d1dd22053f46dda981c0214f890705300d8 SHA-256: 69a87a3ee7f6287e853ccf64cfb828363d28e0e82832c7a8c79dda11230ae054
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics and embedded URL point to a phishing lure, specifically an 'image lure linking to an SEO redirector (free-download phishing)' using the URL https://gimoguvi.ru/wix?keyword=brother+mfc-9320cw+manual to disguise the malicious download. The document body, though heavily truncated and containing non-readable characters, appears to reference the printer model mentioned in the URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/wix?keyword=brother+mfc-9320cw+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465402/normal_60385c7b6f328.pdfIn PDF document text
    • http://hookup750.website/honeywell_hcm350b_review5jopj.pdfIn PDF document text
    • https://cdn.sqhk.co/letonolomo/hgiehhj/prodigy_math_game_toys_amazon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_5fd7ee7cb5863.pdfIn PDF document text
    • https://cdn.sqhk.co/moxelutedoje/fmigjja/stick_it_movie_soundtrack.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomadu/fgeHXKr/58845927924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413718/normal_603fa907b9e46.pdfIn PDF document text
    • https://cdn.sqhk.co/zewapoxi/hcdShdg/android_wear_os_on_galaxy_watch.pdfIn PDF document text
    • http://goodshopsales.xyz/how_to_tie_a_rope_knot_for_porch_swing6b9hb.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/idjr1Rn/seduzedakileseto.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/ifjftje/piclab_photo_editor_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/sotisajen/gfJidjd/94915032717.pdfIn PDF document text
    • http://pressit.space/lodudixodivekunh0yh.pdfIn PDF document text
    • https://cdn.sqhk.co/kewuzatu/d0if6hh/splash_brushes_free.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/hciijdi/dogfight_game_unblocked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff621f7-61c6-465f-b3e0-e828a00159eb/marvel_comics_sword_logo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5784648-bd6f-4461-bf83-43d0b0aed108/xexozugeviwof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c281f2-0f9c-4ae8-a413-7868b5850d9a/63350927918.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_off0001617e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1617E 5708 bytes
SHA-256: b63094a1cd8acc173a97c7dab7286b002b179b893aba40a919581c54ae4e9c75
font_01_sfnt_off000174dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174DD 12812 bytes
SHA-256: 0b481b922222fbc61871dfaf7ad3cd90ed9935b659ed6f15cf0783cc33270d90

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