Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a6a80747f28dbe…

MALICIOUS

PDF

72.2 KB Created: 2021-05-25 13:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3fc15803d3f8dc94e860b57499f6aed1 SHA-1: 79830b1fe1a2047c49998c90ced0a3ebb7cc50c1 SHA-256: a4a6a80747f28dbe5191df7eea83214b7393438bffa663dfa1ce348c59e39b9d
136 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as phishing. The 'high' severity heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' indicates the document uses an image lure to redirect users to a phishing site. The embedded URL 'https://druttle.ru/strik?utm_term=intelectron+motion+detector+bc8950w+manual' is the primary indicator of this malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/strik?utm_term=intelectron+motion+detector+bc8950w+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467306/normal_60336ceccf77b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388274/normal_605bc3ddf2d3a.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/kalanejaxutilif/fedibuzejax.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/sapna_choudhary_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/henry_v_shakespeare_speech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb30208d-c012-473e-84f6-386d9a6677c8/dijonupulugezupononojiz.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/52918593540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9bc6eee-4291-4a4a-9b12-47d4cacdfb52/conflict_management_techniques_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/wodoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e60ac89-779e-47ae-beba-a51abd2e7454/28045730918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b9f7df3-b058-4c71-86a3-b2c0d24c2a2b/sharp_ht-sb602_review.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/7165437257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb9286c-f0d5-43cd-aeff-374c4c27f1c1/90857970080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1fc87a-155e-4c27-af19-74eb475e3ef2/bofezujojilubaniwapedosa.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/eken_h9r_action_camera_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/cdsco_gcp_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/flight_tracking_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/wugewapowenafesoris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e3f7599-ac16-4c1b-a4e5-7fc2d50801a2/shark_floor_and_handheld_steam_cleaner_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/71877742513.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/74999869377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66af686b-c62c-46d8-bf64-b6e9b6b9a463/black_and_decker_coffee_maker_manual_keep_warm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c3e273-cdc5-42e6-ba94-61086e72dcbe/what_kind_of_drawing_is_permissible_in_islam.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/asp.net_mvc_6_tutorial_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bcd5d55-51cb-4edb-890f-1816bf17bdcf/kopofadamifelipufegikenet.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_off0000db40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB40 5692 bytes
SHA-256: 0b33b404dfaf24c4aaf2e6a5ac9c1128bed38708f37813c5cd8fac56e3e4c2d4
font_01_sfnt_off0000ee9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9D 10680 bytes
SHA-256: 66e2cc338e08c4eed714da801a5cdbd4c623b1a50d2f51e1e60d4565e1b2a9e3