Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a8778b66b8104f4…

MALICIOUS

PDF

158.9 KB Created: 2021-03-30 23:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a32c37750b7b5c909eac45386abbc11 SHA-1: 5763a61ff9fec115a48aa64e560ff7212c4d110e SHA-256: 8a8778b66b8104f40e4ff07a4062e457eef567d7b50cdcb0a7f0910b2f50eb2b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, appears to contain text related to a poem, likely a lure to encourage users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://mezovuduw.ru/award?keyword=stopping+by+woods+on+a+snowy+evening+pdf
    • https://static.s123-cdn-static.com/uploads/4454684/normal_5fddf51b8511e.pdf
    • http://pasadurasasagi.medianewsonline.com/tratamiento_para_la_anemia_aplasica.pdf
    • http://forovasax.medianewsonline.com/claude_c_hopkins_scientific_advertising.pdf
    • https://cdn-cms.f-static.net/uploads/4476601/normal_601a193c554d2.pdf
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5fee2b2e9d466.pdf
    • http://kowojolajamuv.getenjoyment.net/bicipital_tendinitis_exercises.pdf
    • http://mugurapit.sportsontheweb.net/campbell_biology_uofa_4th_custom_edition.pdf
    • http://vogolimipogusoz.mypressonline.com/23673812453.pdf
    • https://static.s123-cdn-static.com/uploads/4409248/normal_5ff3c942283ba.pdf
    • https://static.s123-cdn-static.com/uploads/4422643/normal_60096341a70fe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/70f5d69f-435f-4837-b4ef-98e0ab56b3b5/rehraas_sahib_path_download.pdf
    • https://uploads.strikinglycdn.com/files/e46cccdf-3b2b-49b7-91a5-82f54ea3f849/long_happy_birthday_paragraph_for_best_friend_copy_and_paste.pdf
    • https://uploads.strikinglycdn.com/files/7ec8f135-58fd-45a2-87ba-989b45cd0442/xagajep.pdf
    • http://zuzopejorexa.onlinewebshop.net/introduction_to_atomic_force_microscopy.pdf
    • http://tebaputazaxuva.myartsonline.com/how_to_program_a_1998_craftsman_garage_door_opener.pdf
    • https://uploads.strikinglycdn.com/files/044ecff2-c025-45fa-8acc-7e8f356eac26/ar-15_sling_swivel_rivet.pdf
    • http://rowoniwetob.atwebpages.com/image_to_editable_word_converter_free_download.pdf
    • https://uploads.strikinglycdn.com/files/39c70bd5-b489-4ca0-b040-ea52c7974031/vivumebigotuverubivekesa.pdf
    • https://uploads.strikinglycdn.com/files/c9c9355d-62a8-4e4e-9de1-259580130672/dell_ax510_sound_bar_installation.pdf
    • http://kuxoxokazutuv.myartsonline.com/aleister_crowley_the_book_of_law.pdf
    • http://rudozanel.epizy.com/32494609331.pdf
    • http://mujopoweter.rf.gd/zuzilorederuwimo.pdf
    • https://uploads.strikinglycdn.com/files/fc0414ea-ba43-4c3f-8d89-0a34e788308f/berorinozevidal.pdf
    • https://uploads.strikinglycdn.com/files/1a6c7db2-fce1-472b-97de-97c6c72726d5/nofivop.pdf
    • http://buwifojozoziden.atwebpages.com/76676502922.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b70.bin
9d31e155ad395377122642d9a73f6313772c16e0fe8575f4209e9458728ed9c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B70 93844 bytes
font_01_sfnt_off00023212.bin
44b34a45d3b0349712bb9c51bbcad89bb6555afbb883cee41ad5f61168220d8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23212 5580 bytes
font_02_sfnt_off00024544.bin
0c36a19cfceced9298717da6a41e125a50287c951b688269d7ddbee45cd5a093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24544 11572 bytes

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