Malicious PDF — malware analysis report

Static analysis result for SHA-256 9963efbdd688e11f…

MALICIOUS

PDF

75.7 KB Created: 2021-04-16 19:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f16083e5003c4a46253d980d14980dbc SHA-1: 6a4f5cb730f1387da8efc133b951d93855e33de1 SHA-256: 9963efbdd688e11fca5e46f2db9dbd4cc62f5b22339ce6692d18664520ec2e15
136 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded link disguised as a free download lure, directing users to a suspicious URL. The document body, though heavily obfuscated, appears to contain text related to the lure, suggesting a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/strik?utm_term=how+to+become+a+certified+yoga+instructor+in+california PDF link annotation
    • http://ganoget.scienceontheweb.net/adobe_reader_portable_download.pdfIn PDF document text
    • http://onlineeshop24.xyz/avast_free_for_windows_7_offlinew2csp.pdfIn PDF document text
    • http://keepsufi.space/what_was_life_like_in_the_1930s_uk17u1p.pdfIn PDF document text
    • http://demuxum.getenjoyment.net/couper_un_sur_iphone.pdfIn PDF document text
    • http://miribut.mywebcommunity.org/wojusato.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/besafefaf/darling_songs_free_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/50696015782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79de5d6f-24fc-4f8d-b6a7-d0122cc6d620/pidevowubetubevaper.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/garawuwenusufosepakenax.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/sd_card_formatter_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27aa6bb-40a8-47c3-b6c9-0ecb3b52be33/what_do_i_need_to_make_a_smoothie_with_frozen_fruit.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/leveling_guide_wow_classic_alliance_mage.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/set_adapter_in_gridview_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ea4c8a-bb84-4bdf-b596-d38f0fe11a48/how_to_fix_svc_tire_monitor_2008_chevy_cobalt.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/bouncer_11_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/nj_workability_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1333e3e7-34e2-4193-9259-5b949ddb3a94/how_to_get_rid_of_water_bumps_in_mouth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4c8f47-eac9-4173-bb93-b15822841603/it_job_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/469313b2-16c5-4d1d-8586-ee0eefbf4048/entrepreneurship_final_exam_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec01b47-6583-49c6-8680-2351df246293/82011309562.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/70847473812.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/95657327073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc60264-e2c2-422e-b8f2-a7ae3fcac18e/13849961835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65eaf86-262c-4a69-8350-6ef364235216/psychoanalytic_theory_application_in_literature.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_off0000e878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE878 5636 bytes
SHA-256: 44794d0d985222dbb578c2784ae8f667fa8bb2dd503bdfbd77346b4d5ef25fa2
font_01_sfnt_off0000fba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 10808 bytes
SHA-256: 8107839a8da0b5e32f62d2865e31df086771c8139c62fb5fb1e6f74a902f9000