Malicious PDF — malware analysis report

Static analysis result for SHA-256 f066ffbf8595eb84…

MALICIOUS

PDF

73.9 KB Created: 2021-03-18 21:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 308de0cd361e8cade3a57db282f572d1 SHA-1: d76d51ec28bd4fbbfd1f813568e610c627754a00 SHA-256: f066ffbf8595eb841a75d197032a84c89a8ac941595604712c24448aa0c01e61
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website designed to trick them into downloading a malicious file. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of an external URI is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://ponafet.ru/award?keyword=pdf+ausf%25C3%25BCllen+und+speichern
    • https://cdn.sqhk.co/satidaruxami/fnqWvAH/color_switch_play_on_cool_math.pdf
    • https://cdn.sqhk.co/xedomobedusi/gfhjiei/extensao_chrome_video_downloader_plus.pdf
    • https://static.s123-cdn-static.com/uploads/4496404/normal_5ffd9f14abeb1.pdf
    • https://static.s123-cdn-static.com/uploads/4401714/normal_5fe06175354b8.pdf
    • https://cdn-cms.f-static.net/uploads/4368732/normal_60409ebe9b4dc.pdf
    • https://cdn.sqhk.co/gupikekarobo/cgffgfC/19063628109.pdf
    • http://fowirunuwajuk.iblogger.org/performance_bike_germantown_md.pdf
    • https://static.s123-cdn-static.com/uploads/4493245/normal_5fc9beee1d37e.pdf
    • https://cdn-cms.f-static.net/uploads/4382420/normal_6032dacd2231f.pdf
    • http://garanibukumom.scienceontheweb.net/40494391615.pdf
    • https://cdn.sqhk.co/wajerewuwer/fXS4gfq/knives_ship_free_return_policy.pdf
    • https://cdn.sqhk.co/vovewotutal/hbihLjg/22450194619.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/779c598d-d42f-4a00-a903-8aba94f5a35c/mpc_essentials_setup_mpd218.pdf
    • https://uploads.strikinglycdn.com/files/51d26c54-35f0-43ff-ad78-feeb0bba26b3/20455217165.pdf
    • http://suzufesa.epizy.com/wobasajejijekeru.pdf
    • http://fetekovabu.onlinewebshop.net/fiwivixametimewiwoboxu.pdf
    • https://uploads.strikinglycdn.com/files/ae11f8f8-fb57-43f3-a97a-b7c331b81059/iso_22000_requirements.pdf
    • https://uploads.strikinglycdn.com/files/ceeba316-1fed-4a65-a476-b894bd75adc3/storyboard_artist_jobs_nyc.pdf
    • http://liduvitulugug.onlinewebshop.net/how_much_does_a_5x5_round_bale_weigh.pdf
    • http://kavibajegis.onlinewebshop.net/dsl-2750u_firmware_middle_east.pdf
    • http://mobopufo.rf.gd/nfl_game_pass_android_app.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_off0000e091.bin
7a501db9a464317c41b87fc02015e811101883de66dbe7a8bc43d54725fed09a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE091 5364 bytes
font_01_sfnt_off0000f298.bin
8fdbe1c584d9961ebf8942553180b0c5e32c42a5249cb3d8abaeb53bd5bfe95f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF298 11560 bytes