Malicious PDF — malware analysis report

Static analysis result for SHA-256 5591b8b5cd8af566…

MALICIOUS

PDF

110.9 KB Created: 2021-03-29 08:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6a0f92262b323183f31cb57c7d0494c SHA-1: 7d1ed6f231d58169ec2f15b63232a670ce3457ff SHA-256: 5591b8b5cd8af56668138ab470625aac2a52fb4b1fe6153b149c8dbac89b2bb1
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, disguised with keywords related to popular anime, likely leads to a phishing or malware distribution site. While no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://dafemum.ru/wix?keyword=my+hero+academia+season+1+ep+1+funimation
    • https://cdn.sqhk.co/vagekasip/cjg8jf6/hearts_choice_cafe_calgary.pdf
    • http://all-gopro.com/kakenekobikokegilrdye.pdf
    • https://cdn.sqhk.co/wabasenenem/jcheChc/59984489846.pdf
    • http://sutiwejepeb.22web.org/93773873064.pdf
    • https://cdn.sqhk.co/tovipovo/dF8EhhY/68466737532.pdf
    • https://cdn.sqhk.co/puberufibo/unyRjiJ/the_office_parkour_meme_episode.pdf
    • http://mandarins.space/73036154236478pk.pdf
    • http://alcexpress3.xyz/les_diffrents_sens_d_un_mot_cm2x0mp7.pdf
    • http://nukels.xyz/mary_j_blige_albums_downloadolqxx.pdf
    • https://cdn.sqhk.co/kitujesijak/hfP7jeW/black_reaper_pepper_scoville_rating.pdf
    • http://particulieres-societegenerale.best/how_tall_were_bible_giantssllby.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_b4a037f1fe664c6b9347cbf03c263b97.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c59b7835-df8f-4bc9-acd4-419b1c383921/are_beats_studio_3_better_than_solo_pro.pdf
    • https://uploads.strikinglycdn.com/files/bad11514-0602-4be2-bd24-b9704c04ce64/present_perfect_worksheet_with_answers.pdf
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_8f8739000327461d8aa5e7b5c6c51dc0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/720e0ec4-d686-4186-9c63-30928904f086/sims_3_generations_house_lifesimmer.pdf
    • https://4c8cc264-4606-483b-a6fd-3ab48ba5c15a.filesusr.com/ugd/c626f4_d6e59a4c966e4fc5adfa9e4069c009c7.pdf?index=true
    • http://rulukufijozijud.rf.gd/how_to_setup_tp_link_av600_powerline_starter_kit.pdf
    • http://nuwuzokapa.rf.gd/5919395429.pdf
    • https://uploads.strikinglycdn.com/files/fb9d109d-82be-462f-a39c-2660877bcbb4/epson_wp-4530_not_printing_black.pdf
    • http://rusireges.epizy.com/bimmercode_apk_cracked.pdf
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_a4d5fe3d4af44a57807566eb2709bbdb.pdf?index=true
    • http://dewuxad.rf.gd/how_to_create_a_diverse_learning_environment.pdf
    • https://uploads.strikinglycdn.com/files/5c3c7fab-8173-4fa9-9c82-58040bc5e888/who_is_the_protagonist_in_the_open_window.pdf
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_b0272c636236488698e15cb45bde24ed.pdf?index=true
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_cb83f381fa054478ad430e4d080bf5f8.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_off00014b5a.bin
4cbff0ca2c42381405688a57784511f02cbcf5f6201ad1fbb07993f927810a40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5A 11988 bytes
font_01_sfnt_off00017269.bin
73f4cb7ef4cb4b18ec6beb5ac8f7b546d559753a40360be496d7315234593dd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17269 5520 bytes
font_02_sfnt_off0001851b.bin
f347fc7c5a2fbc3e9e2ed399c7152a56f22d08d170f177194c6a59f76fbc514b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1851B 11468 bytes

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