Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6ae9fef6a5cf2f…

MALICIOUS

PDF

78.2 KB Created: 2021-04-16 23:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fa948d16699713518612401fa19e7eb6 SHA-1: 27705377fce0d2b129d0cdaefbf9bc199235b30e SHA-256: 9e6ae9fef6a5cf2f3419253a7fd800918178eda6639b864ddfec36bd6d497a39
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 detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains a high-priority heuristic indicating an image lure linking to an SEO redirector, which points to the URL https://seumenha.ru/strik?utm_term=secret+of+the+ages+manly+p+hall. This URL is likely used to facilitate a phishing attack or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=secret+of+the+ages+manly+p+hall PDF link annotation
    • http://instapriz.site/76871378152rybq.pdfIn PDF document text
    • http://republvinb.fun/kumubijepunigiljr1vk.pdfIn PDF document text
    • http://meetsalle.xyz/88672336336wfcq7.pdfIn PDF document text
    • http://ru-en.xyz/23751312074ae6vj.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/pevarijidasalop/87460567278.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/winter_survival_kit_for_car_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acbbd402-7f66-4899-9d79-7c3e1730543c/chemistry_structure_and_properties.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/hp_notebook_bluetooth_driver_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/basketball_wallpapers_hd_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ddf1e2d-d93a-49e5-94a6-83bc3191b3df/what_is_meant_by_psychoanalysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9759331-69d8-4752-b2b3-6a1ebff5793c/ham_radio_foundation_licence_test_online.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/dogowomu.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/wirifugegotem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/111dfb4a-ae6b-411e-81bd-44ebff85caf4/how_to_add_camera_to_swann.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f28cf06-6fcb-428e-843c-b3a79bd61c7b/dunkin_donuts_medium_caramel_iced_coffee_with_cream_calories.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/32546603601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c32fc7d-c3b8-43ba-90cd-fb17e13c20ee/how_much_does_oscp_exam_cost_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/how_to_save_new_project_in_final_cut_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/184160bd-48ea-491a-9ed2-a859252cd392/beats_solo_2_wireless_change_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff58aab-82fa-4a9a-8665-58473914dee7/28712713965.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/garmin_uhd_93sv_vs_94sv.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/fawotib.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_off0000ef73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF73 5632 bytes
SHA-256: 8683ec3b7a4a248b05ad9d1de6c1db1086d9ed533d7fad13ec3a33780ac5ca74
font_01_sfnt_off00010283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10283 11516 bytes
SHA-256: 1ac801dae124af9189ff4a7c3650b68d721bac68d4ed2458cf602e4194d97d90

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