Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf75e36419f3625…

MALICIOUS

PDF

73.3 KB Created: 2021-03-08 15:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7d2aa1de4f5eadb6087fd205e9fdab44 SHA-1: 23231637c26dc817fe3f48aef0dfa023a3d33bd8 SHA-256: baf75e36419f3625692fa6b062060bcefaf94f276d111760db54db10fe1bb28d
96 Risk Score

Malware Insights

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

The file is a PDF that contains a link to a malicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The embedded URL, 'https://xezojetit.ru/strik?utm_term=install+pdf+preview+handler+outlook+2010', is likely intended to trick the user into downloading a malicious payload disguised as a PDF preview handler. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=install+pdf+preview+handler+outlook+2010 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5fd2a407d1f3a.pdfIn PDF document text
    • http://dfwshootersupply.com/zatafabizipennip0.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/biologia_celular_y_molecular_de_robertis_16_edicionw0jy2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479441/normal_603a4d9ea4176.pdfIn PDF document text
    • http://coloradocustomelectric.com/kojegudafiropadezaxae2l2v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_6011fb9106ffc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454684/normal_5ffa44f6d840e.pdfIn PDF document text
    • http://salonvarna.com/the_magnolia_storym37ii.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484605/normal_5fe8a33490413.pdfIn PDF document text
    • http://all-system7.club/how_to_use_different_pool_filter_valve_settings1ubet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/also_as_well_too_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2e9a0b6-9d08-412f-9d37-18aabe5ea351/64163418228.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/fake_caller_id_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3686945a-47c2-4776-94b0-a8043486b9e8/how_long_does_it_take_to_cook_beef_jerky_in_a_dehydrator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6d4292-f51f-4a16-b2ee-8ed8093ea0b4/physics_halliday_resnick_krane_volume_1_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/hospitality_degree_worksheet_unlv.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/masozifosuv.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/benew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1ffec9b-f702-4164-8b3d-39600558262a/why_is_growth_and_development_important.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/49284836600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b325e946-06e7-4db4-9d26-7474a9c8824c/history_of_jesus_christ_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/beekeeping_books_free.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_off0000e0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B4 5608 bytes
SHA-256: e95f6944557019ddbcc5c4ccf2a77b0214412743e82ef2022843a28342ce6798
font_01_sfnt_off0000f3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DA 10504 bytes
SHA-256: 8336120688188c4430596f78926b4ec5b4e0313f82f791215a7288a930b5b012

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