Malicious PDF — malware analysis report

Static analysis result for SHA-256 73828d123f570446…

MALICIOUS

PDF

76.2 KB Created: 2021-03-29 12:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9c9d7a9d33b54e286d37fab4c674aa1 SHA-1: 7c2a004958e7c6c7a573012245db11c0ba4a8bfc SHA-256: 73828d123f570446a2563c2b2f9edf3797a331aaab7c42dbb8ef27034647f25a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a potential phishing or malware distribution vector. ClamAV detection and ML classification further confirm its malicious nature. Although the document body is heavily obfuscated, the presence of external URIs suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=darshan+chakravarthy+video+songs
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5ff2017d14455.pdf
    • http://lg-supportteam.com/how_to_reset_networx_nx-47lysi.pdf
    • https://cdn-cms.f-static.net/uploads/4451356/normal_604421a143457.pdf
    • https://cdn.sqhk.co/zujagepax/dmpgjfv/kpop_artist_dean.pdf
    • https://cdn.sqhk.co/nelufebo/dKSLkid/hair_salon_in_walmart_near_me.pdf
    • http://afracheat2.xyz/movisimawilonazafukj8jh8.pdf
    • https://cdn.sqhk.co/bikegola/gGVifhb/monster_shooter_game_download.pdf
    • https://cdn.sqhk.co/xojurolaruk/iFFYBjc/megefira.pdf
    • http://world-wildshop.com/609940846321159a.pdf
    • https://cdn.sqhk.co/vefomatakin/Voj99hi/american_truck_simulator_apk_download_for_android_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4417318/normal_604a0e02d21ba.pdf
    • http://ejinaya.com/fluke_linkrunner_at_2000_fiber_testxodv9.pdf
    • https://cdn-cms.f-static.net/uploads/4496602/normal_6012cdb244758.pdf
    • https://cdn-cms.f-static.net/uploads/4384296/normal_603f858c4886f.pdf
    • http://trackengine.host/sony_rx100_mark_iii_manualvurfw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xedewofuretujo/bachna_ae_haseeno_song_raagsong.pdf
    • https://uploads.strikinglycdn.com/files/fc9c1160-904b-44f6-88b6-09735a2ccc3a/ford_mustang_gt_premium_for_sale.pdf
    • https://s3.amazonaws.com/petikamov/county_cricket_ground_bristol_pitch_report.pdf
    • https://uploads.strikinglycdn.com/files/89ad0cd5-d5fb-4c54-8ca7-7850056d0697/goxataki.pdf
    • https://uploads.strikinglycdn.com/files/e30614d2-dd5b-4684-b685-ea2dc72ae6b2/pebopovexagi.pdf
    • https://uploads.strikinglycdn.com/files/928cc265-c5b3-4b01-80fa-35162ae3512c/45987779817.pdf
    • https://s3.amazonaws.com/rewepalazamiso/50637989525.pdf
    • https://uploads.strikinglycdn.com/files/6b581f7d-c1d2-4e7f-9244-aea3b3aee26b/light_reader_free_books_and_novels_download.pdf
    • https://uploads.strikinglycdn.com/files/66313814-cc21-43b3-8163-d1c5cd496c46/what_are_the_essential_life_skills_required_by_a_professional.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_off0000eacb.bin
dad1a7bb1c0242c152954a541fb606d32712ef95e7ef1d66dcbcbf791ad33666		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 5396 bytes
font_01_sfnt_off0000fd34.bin
abd44a5b6812fe11aab8113cb7d994f09cb2e416c96f178b3d1fef953aebcf71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD34 11168 bytes

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