Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea8d59770786189…

MALICIOUS

PDF

75.1 KB Created: 2021-03-03 18:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 42415b1a3bd4accb51553b76460c2f5d SHA-1: 20409720336ad6aa6abf0563882837a498cff8a1 SHA-256: aea8d5977078618936a7e5e67d5e5c31fbeea2eb55a2dfa7d80141f735cbf1c9
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, specifically designed to trick users into clicking a link for a 'free download'. The embedded URL `https://soxebez.ru/123?utm_term=what+is+socio+economic+information` is a known redirector for phishing campaigns. The ML classifier and ClamAV detection strongly support the malicious nature of this file, classifying it as a phishing trojan.

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://soxebez.ru/123?utm_term=what+is+socio+economic+information PDF link annotation
    • http://snapchat-alert.com/head_first_pmpyy7q7.pdfIn PDF document text
    • https://cdn.sqhk.co/vobilurerire/vYkjhic/band_pass_filter_circuit_on_breadboard.pdfIn PDF document text
    • http://meetsalle.xyz/how_do_you_get_xbox_live_gold_2020_for_freeopg3o.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/jFwifjd/varotamokejixugoselip.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/gjWeac4/veselidaxapipav.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/phjfTB0/survival_craft_world_app.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/fkOajd9/popular_pop_music_songs_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_603192a8e18fa.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/a66odja/66832429776.pdfIn PDF document text
    • https://cdn.sqhk.co/fokigegoma/RmWNgdL/simcity_buildit_cheats_ios_2020.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/bulolimepol/sevobipizoxezemitafadu.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/fire_balls_up_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/employment_reference_letter_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/jackson_chameleon_care_sheet_petco.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/bufodavitekebawarigubobep.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/alkanes_questions.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_off0000e885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE885 5100 bytes
SHA-256: 61c2fd39f282faad55272470dc9034b8b110a9383ab5355ae59fb176bb528c2b
font_01_sfnt_off0000f9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C0 11004 bytes
SHA-256: 3b192dbe0180788bfa9700cbe0814b3f5c71f533001e39ca3c3518833d21e2bd

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