Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f80865160645d7b…

MALICIOUS

PDF

85.3 KB Created: 2021-03-10 13:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6a7f9f592c9e08bb1a86fb3b2c40a74 SHA-1: 799a21ca09ba34a6ddf400814200d5f4d0347838 SHA-256: 3f80865160645d7b478ed543c5e34b9d9e526c0f7acf95d51f99cdb3a3e337a9
144 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a random URL link and a visual download button, suggesting a phishing or social engineering lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL and the primary suspicious URL point to a potential second-stage download, likely a phishing document or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://botokaw.ru/wix?keyword=melvern+lake+marina
    • http://tovelksa.website/calculator_app_javabav72.pdf
    • http://netolenogafa.getenjoyment.net/how_many_calories_in_2_dunkin_munchkins.pdf
    • http://abanca-electronica.com/lofawizimewuzatobonopegoe7y1d.pdf
    • http://jiwapadenejeza.getenjoyment.net/kirufejowigikavasanu.pdf
    • http://vumavotanumibuv.iblogger.org/supercalifragilisticexpialidocious_lyrics.pdf
    • http://zawugudumi.getenjoyment.net/why_is_orange_my_favorite_color.pdf
    • http://difemetudanad.22web.org/how_to_draw_a_nose_quick_and_easy.pdf
    • http://wejowadizabudex.mypressonline.com/56219756517.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sizadagazagaj/tricep_kickbacks_proper_form.pdf
    • https://s3.amazonaws.com/davawina/kazaguj.pdf
    • https://s3.amazonaws.com/juzewojavomofew/69898661720.pdf
    • https://s3.amazonaws.com/gixawetopoli/xupuwagijaledodiwejo.pdf
    • https://s3.amazonaws.com/punagilelabon/21827446508.pdf
    • http://mugofunuwutav.epizy.com/canard_pc_hardware_40.pdf
    • https://s3.amazonaws.com/jasadavebaga/36587825724.pdf
    • https://s3.amazonaws.com/ruzumeb/sap_business_one_accounting_module.pdf
    • https://s3.amazonaws.com/midipes/libubudiwovoxevik.pdf
    • http://jokubamobivavum.onlinewebshop.net/cracking_the_coding_interview_github.pdf
    • https://s3.amazonaws.com/zagubip/scholastic_aptitude_test_philippines.pdf
    • http://rifunasi.epizy.com/nekaravix.pdf
    • http://faduzidivatakid.epizy.com/bestwap_in_video_song_2019_bhojpuri.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_off00011296.bin
2b66f6414b108265d598a0ec1e9027189f8d1cabe1691a5f05842d970d2241a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11296 4784 bytes
font_01_sfnt_off000122d4.bin
496ad1fc44576da8b621dec8bc153b0d8fc7b28d472f9bf94bdb5a8dd1442748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122D4 10876 bytes

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