Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75876a0471e00b9…

MALICIOUS

PDF

80.9 KB Created: 2021-03-20 19:39:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe28cc04331a0a58a57a29db5e854bc8 SHA-1: 1c26d0dc328e0f451d388f6b17696cbd96c16dc1 SHA-256: c75876a0471e00b9f1ffa85b24124244d1227a9341aeb7b135071fde333f4823
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, and numerous other URLs were extracted, many of which are unknown or potentially malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://kuzutuzo.ru/wix?keyword=claim+of+fact+essay+topics
    • https://gexipatar.weebly.com/uploads/1/3/1/6/131606255/511c5a0a1f1213.pdf
    • http://re-prime.ru/summer_infant_panorama_camera_wont_syncylmfo.pdf
    • http://axecheat6.xyz/the_beautiful_and_damned_song_lyrics4ugux.pdf
    • https://fuwexizadosilu.weebly.com/uploads/1/3/5/3/135318643/20711e51.pdf
    • http://outputqwvk.space/24232726845mjtzb.pdf
    • http://meblik.su/violence_meaning_in_tamile5qgu.pdf
    • http://neuroncraft.online/quote_about_walkrda89.pdf
    • http://meetly.space/6886459878hhv0v.pdf
    • http://autobaff.xyz/betoxexuluxerupumuzowojisl4dl.pdf
    • http://theraisins.pro/78333555707et4oz.pdf
    • http://hookup154.space/pigedivobdwcs.pdf
    • http://bestcreditcheck.info/pablo_neruda_sonnet_17_in_french84gg0.pdf
    • http://supsun-aero.com/815065296449ecq0.pdf
    • http://garant-ritual.online/best_ar_15_assembly_lubekf4om.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/e23ac4ad-2ccc-4f9c-82b5-7ad1a50052dd/w3schools_html_tutorial_free_download.pdf
    • https://uploads.strikinglycdn.com/files/26ed9631-ec62-44b2-87de-cbe66f63709c/physics_assignment_class_9_6th_week_answer.pdf
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_1cf1c690a7f5471b877f282d4d871f36.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f242a9ef-6649-4164-a0d2-228b1584ba49/64270784515.pdf
    • https://uploads.strikinglycdn.com/files/0609a53e-6748-49af-9c6b-156ce9a582f7/39422275567.pdf
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_ec67d43564f84c41ba079b173bb81722.pdf?index=true
    • https://uploads.strikinglycdn.com/files/241cc884-abec-407b-83b0-576c664652bf/letofefelogixokakite.pdf
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_09abe6e5030e477bb14cfde86796fbc3.pdf?index=true
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_5de1ed7ccbce4bc2b05a0e5e607eae31.pdf?index=true
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_ef314770ff244243a966e6180baf4e73.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f34f.bin
fc537533cb1bab4fc3ec3414d17b0d0496feac5de741358b013e0a7f33b39164		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF34F 4872 bytes
font_01_sfnt_off000103fd.bin
1555f19de24975562e2b1760117f1afa151c61c80e9fcfa2973816262f67b1ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103FD 10580 bytes
font_02_sfnt_off0001280e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1280E 4324 bytes

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