Malicious PDF — malware analysis report

Static analysis result for SHA-256 908ddd2438ce6f8c…

MALICIOUS

PDF

196.6 KB Created: 2021-03-15 13:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e5550b6a1b9b363953e4d23f29d2058 SHA-1: d3ea95449fd50758288088354102d689f28492af SHA-256: 908ddd2438ce6f8c1f5fb9473b2c754d48aa3c73628669dbcd12ccfcdacea58a
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of external URIs and a visual download button suggests a phishing or social engineering attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a potential download or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://midufefew.ru/award?keyword=capela+sixtina+a+ortodoxiei+romanesti+pdf
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/86639.pdf
    • https://cdn.sqhk.co/gobuwovuv/BjeyJAR/voxoletedunufajirijexa.pdf
    • https://cdn.sqhk.co/vekuperik/f2ieieh/dice_roller_online_d20.pdf
    • https://manatelagaren.weebly.com/uploads/1/3/1/4/131437493/fekejanolilifurive.pdf
    • http://zuxenegobepejij.22web.org/types_of_ischemic_heart_disease.pdf
    • https://budojidotepaso.weebly.com/uploads/1/3/5/3/135312143/2541510.pdf
    • https://cdn.sqhk.co/detokelixipi/rr7HGia/8957708433.pdf
    • https://cdn.sqhk.co/tosilura/lhfghji/17898614182.pdf
    • https://koponabunabo.weebly.com/uploads/1/3/4/5/134520941/a9d3de61.pdf
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/c9b698f35b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pevoxetawalob.rf.gd/83748422589.pdf
    • https://s3.amazonaws.com/jedobufudajewu/all_of_me_chords_sheet_music.pdf
    • http://kibowepimupuwa.rf.gd/cambridge_primary_english_stage_5.pdf
    • https://s3.amazonaws.com/dujepav/muraramemidegi.pdf
    • https://s3.amazonaws.com/daraniwekamidir/sg5010_servo_motor_datasheet.pdf
    • http://tagitefidunun.epizy.com/9002530724.pdf
    • https://s3.amazonaws.com/wezukep/bawilizuzabup.pdf
    • https://s3.amazonaws.com/mejados/live_nettv_apk_live_tv_app.pdf
    • http://wivoruremuwun.rf.gd/honours_1st_year_marksheet_2017.pdf
    • https://s3.amazonaws.com/luworizesupox/autocad_2007_softonic.pdf
    • https://s3.amazonaws.com/tokafanawa/is_khan_academy_good_for_sat_preparation.pdf
    • https://s3.amazonaws.com/jotizifime/64947056857.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002cb0e.bin
5c9b011f664d8b8623cc276ed4fb6346024be32eb74aca119decc7af52a3b177		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB0E 5160 bytes
font_01_sfnt_off0002dc83.bin
90e8349b21668baa7ad06c6e8a30ad47fe5ed0a52620ff5288fc6a5a47674201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC83 11716 bytes

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