Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae491af93a027780…

MALICIOUS

PDF

76.5 KB Created: 2021-04-02 03:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e1b02fc46030e44983380f5d7aa26612 SHA-1: a34a5627a8062834567ca099ab9d5a47747cd386 SHA-256: ae491af93a0277809bf584011cabac2f8829fed3413f10891b810f39344a0af5
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an external URI pointing to a suspicious domain, likely serving as a lure or initial download point. The document body is heavily obfuscated, but the presence of a download button heuristic suggests a user-interaction-based attack. The file's structure and embedded URLs are consistent with a malicious PDF designed to trick users into downloading further malware.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/award?keyword=alesis+vi49+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/xudadidi/qiboQ8J/volimojetobuda.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/ijhArgj/kodiak_alaska_real_estate_agents.pdfIn PDF document text
    • https://cdn.sqhk.co/kikepedu/cn7jgih/fijofetopitiwubusunet.pdfIn PDF document text
    • https://cdn.sqhk.co/bowawugafux/Cjdjdhi/ganagudadolo.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/guLnblV/lock_screen_password_remove.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/Bijhhw5/rc_buggy_racing_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/mekekomubun/jjg2rgg/one_night_ultimate_werewolf_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/FigWotE/shell_recharge_laadpas_kosten.pdfIn PDF document text
    • https://cdn.sqhk.co/gelowidabik/igigFpx/65927323809.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/hfYgf1A/komofejuzafemore.pdfIn PDF document text
    • https://cdn.sqhk.co/jadizefon/avih7hb/39605420349.pdfIn PDF document text
    • https://cdn.sqhk.co/duxisabaza/jhejikV/best_ear_trimmer_consumer_reports.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/dQDGjdX/wimepezusoxutowuvozomud.pdfIn PDF document text
    • https://cdn.sqhk.co/pulizojiwim/pPzMngd/womens_red_sleeveless_button_up_shirt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/09297bd6-33e2-43ea-a857-b7861f3d6916/genibifa.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/bupologinawapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b2bbe2-e177-411f-9197-59542f0d762a/51184166531.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/lixatirozulonuvutoredudon.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/what_is_binary_operations_in_mathematics.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/bts_dope_song_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e3b1243-e9a3-42a9-81ac-5f33a6bea202/kixanaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44e1b6c-b74d-4647-8788-392fb9189ba1/lejusitawopaza.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/21077378718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b93f286-6a4d-4578-8fa0-ef762737e4f7/hp_laserjet_p3015_driver_for_windows_7_64_bit_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/85693457028.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_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 5384 bytes
SHA-256: 6e38ce4c39acff555196540266441476f3b8a451aa4283fe48da5e6cb840e310
font_01_sfnt_off0001008d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008D 10428 bytes
SHA-256: 9df2069d090bdcf8a40437a04e0c1873085058c7d0cd8210aa4a9604609cb47a

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