Malicious PDF — malware analysis report

Static analysis result for SHA-256 5218d1feadb17e2b…

MALICIOUS

PDF

77.3 KB Created: 2021-03-25 15:16:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 76c0fa765616df4ae4179a2f60012686 SHA-1: b3be7b13410de9121a0190fc8602bd41349112ed SHA-256: 5218d1feadb17e2b273ca5d28bc77028e75abe761905b05af2dcdbbf7ede2794
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting domains, suggesting a link farm or redirection mechanism. The document body, though partially corrupted, contains text related to 'crossword puzzle answers', which serves as a lure to direct users to external malicious sites like jumiwimov.ru.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/wix?keyword=the+rise+and+fall+of+the+byzantine+empire+crossword+puzzle+answers PDF link annotation
    • https://cdn.sqhk.co/kubepugemaki/Hx7UgiF/birds_of_prey_2020_cast_joker.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/cOxiqgg/carrom_board_shop_near_me_open_now.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/hfhehdj/70148791417.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/jFVgcig/77189805841.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/giSOqF6/java_stack_exception_stack_overflow.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/fjfN2hc/banco_do_brasil_americas_login.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/3wtHohg/retro_gp_t_shirts.pdfIn PDF document text
    • http://saxosoxajivovud.medianewsonline.com/wuvubimaxifak.pdfIn PDF document text
    • http://sujisopoboraru.iblogger.org/dipeluvakavabawodedud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3082df10-7ef3-4118-8ade-51e599a94864/what_to_do_if_someones_dog_dies.pdfIn PDF document text
    • http://gatapin.rf.gd/speak_now_1_teacher_s_book.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/61318496005.pdfIn PDF document text
    • http://femodizabofowu.epizy.com/what_should_i_name_my_black_jeep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc32c84-a46a-4770-a700-8f1685001384/5062351588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ab7d4a-7a1d-4b4f-9aca-7d20fd3ad833/listen_and_hear_synonyms_or_antonyms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1926245d-a167-4909-82f4-fa831e059105/16679912847.pdfIn PDF document text
    • http://teropisarazo.myartsonline.com/dutch_arbitration_act_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a46d70-2088-41a1-ae90-d27096181689/basic_linux_commands_with_examples.pdfIn PDF document text
    • http://lasuwutiganije.rf.gd/guzak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d680037-6607-43c4-b4be-f4d75df57703/how_much_do_interior_designers_make_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a79a309-be9a-455a-b4d8-260fdd121110/liwad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/126b5d7a-b753-4933-bebb-c2bfd2a7391b/how_much_does_a_first_officer_on_a_cruise_ship_make.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEC 5728 bytes
SHA-256: 0178a2b6823c1f61c92f1dc1a2f5df8acf500ce93885b96d9b98a808e73e2ca6
font_01_sfnt_off00010251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10251 10884 bytes
SHA-256: 14dbf81ea51d8cc9b8c905199e19b537e4f5af61a487e1dc0b70d701e4cd66cf

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