Malicious PDF — malware analysis report

Static analysis result for SHA-256 d33c0c6179b24e3b…

MALICIOUS

PDF

111.8 KB Created: 2021-03-15 09:00:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b0f0a160edd8716bb07cd59152ee2d2e SHA-1: 2a17e6f4cd07a62ebd88c62993ec79406591315b SHA-256: d33c0c6179b24e3b149ea8d121fbad4793c2468fb14728e32860a4df7b1af8ef
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one pointing to 'maypoin.ru', which is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9782

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://maypoin.ru/strik?utm_term=synonym+of+sense+organs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370280/normal_5ffa1a9a296d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_600ad68ba0fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461748/normal_602af419b254c.pdfIn PDF document text
    • http://wovogabaposexe.22web.org/arena_of_valour_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480884/normal_5fe6420a455cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465687/normal_603828374891c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/234647f9-42d2-4607-9cab-319810afbf8f/present_perfect_simple_and_continuous_exercises_with_answers.pdfIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_3d2e45998b8b4bf792132f8472e41a4d.pdf?index=trueIn PDF document text
    • http://numovid.epizy.com/gixilusekilasegajevi.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/11512072180.pdfIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_c017032e1fc24b068a8d6405c5585e98.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/jll_logistics_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/gaguxa.pdfIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_666bd95da7d04e8086d2dcb75caaa6bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a1261c5-a1a1-4bca-9d87-38e82fb50c7e/how_many_miles_will_a_honda_shadow_last.pdfIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_7205526021664a98afb17d4e49c7a0af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/velotagulolevi.pdfIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_5112b5e5a49648fa9fa5ca3e182ef11c.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_f482a03870e946e189aded0e7db06320.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/916f24aa-6f91-4059-bc3a-d95bcbd783d4/fundamentos_de_marketing_william_stanton_libro.pdfIn PDF document text
    • http://jopatodorijapu.epizy.com/riddle_puzzle_questions_and_answers.pdfIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_a188f3a21e124333a73cd99464396b27.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a978abc-4e49-4f90-923e-22a630433aa0/27888385710.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/cocoa_beach_florida_weather_report.pdfIn PDF document text
    • http://rogitini.epizy.com/application_letter_format_for_job_transfer.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off000184e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x184E8 18176 bytes
SHA-256: 9a53eb0f5d899206140142024e1329928d04523b9b037af6ea44b3d64dff0b7c
font_00_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 5684 bytes
SHA-256: d9df6945b54372b4ce1b038b385752c5e534dd56f39eb70cfae60a2504a527db
font_01_sfnt_off000110f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F8 5260 bytes
SHA-256: 1612956bb078256efa169c45e0a55ec8464a002d550c2deefd9d808cd425a012
font_02_sfnt_off000122cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CC 2656 bytes
SHA-256: dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5
font_03_sfnt_off00012dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD0 2328 bytes
SHA-256: 864cbe2c6973b44d2b71e19ffbffb2328dcb3759b07ceb43c11d5a372fc4956d
font_04_sfnt_off00013886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13886 2108 bytes
SHA-256: d117309382da938f7dffedc42f90dd4217b4d540d75629b80669d975ecbc171e
font_05_sfnt_off00014251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14251 6640 bytes
SHA-256: 538512be6c526ea957b587fa229624d829dca4873b622d187784a60d2c877fcd
font_06_sfnt_off000153ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153EF 16100 bytes
SHA-256: 29cd399f724d7e7817c331941d8442737a7585b1d734da315799040a039b2da8
font_08_sfnt_off0001a1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1B5 3276 bytes
SHA-256: c12c670e310cd2dd0f4b1ea6ea0d01ef35e1284caa1cfc967b978b02bd897c09

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