Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efaa121f0a3d455…

MALICIOUS

PDF

75.0 KB Created: 2021-02-16 22:37:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d191e72e1226062c39ba73ffc59ca82c SHA-1: 78d67f3c5f50e221e6072966a85a89977880c694 SHA-256: 6efaa121f0a3d4555625a2266c52fa2f3bc18ad341c937badfca17faca7ad4ae
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to malicious infrastructure, specifically a redirector at 'https://yafferge.ru/aws?utm_term=lotto+result+6%252F45+dec+16+2019'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to download further payloads. No scripts were extracted, but the presence of malicious URLs and the document's deceptive content suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/aws?utm_term=lotto+result+6%252F45+dec+16+2019 In PDF document text
    • https://cdn.sqhk.co/mokabawimav/ighWTjg/dixie_damelio_song_music_video.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422909/normal_5fcd01c660d7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fe5da3c99af0.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/ccUBjk6/76272924777.pdfIn PDF document text
    • https://cdn.sqhk.co/lizuxutagisu/gdPijnt/ny_company_stores_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/NKheigV/animal_skins_for_minecraft_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zagozunoso/Gjhif3Y/30945914979.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/dgh1zjc/business_management_study_guide_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/lewemimi/1AMjdge/euro_truck_simulator_2_ukraine_mod_manager.pdfIn PDF document text
    • https://cdn.sqhk.co/zapajugadira/hjatbas/hello_neighbor_hide_and_seek_apk_obb_android.pdfIn PDF document text
    • https://cdn.sqhk.co/nujekezitifi/3ZhcPhd/highwayman_poem_audio.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/bDThiEx/battle_heroes_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/aBfgihj/g_voiced_or_voiceless.pdfIn PDF document text
    • https://cdn.sqhk.co/jalosemuv/4WVye4K/49105457256.pdfIn PDF document text
    • http://goossyy.online/vijokedunujulegegutowote8sosa.pdfIn PDF document text
    • https://cdn.sqhk.co/fekurisakez/8Hhjgfo/15409525329.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68D 5548 bytes
SHA-256: 6f843d9c9416a724dd086c03fa0acd8397567b42a5803532196c106155127c01
font_01_sfnt_off0000f999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF999 11000 bytes
SHA-256: 2093015e892467431c8f0919b1977da15c2e072484cf3a8e9f96555427dd92dc

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