Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98d357853a97225…

MALICIOUS

PDF

170.1 KB Created: 2021-03-28 18:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6fa80afafa88a96d15dadee6974c4435 SHA-1: 58adee0a5b2b18ff70808b2912fdfca3295b81a2 SHA-256: e98d357853a97225690ad016d5a6e2cf2b3092dcf78cf27543925a20da54412a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://mezovuduw.ru/strik?utm_term=ubuntu+mono+font+free+download PDF link annotation
    • http://zelolugo.22web.org/what_are_the_4_ps_of_marketing_give_an_example_of_each.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/BuMlgec/spastic_colon_diet.pdfIn PDF document text
    • http://discount50it.pro/kevakijixi1hks5.pdfIn PDF document text
    • https://cdn.sqhk.co/rowazazapa/Ajihe0a/how_to_get_uba_mobile_banking_id.pdfIn PDF document text
    • http://xuzudedol.22web.org/rerisoxanuliz.pdfIn PDF document text
    • https://cdn.sqhk.co/woxiwovar/BOiggeL/water_bottle_mockup_template.pdfIn PDF document text
    • http://wrinklestiltskin.com/976232328914mihd.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/0ihhiNn/lejugupegamejusegub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xovapigebiz.rf.gd/abdominal_migraine_patient_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/707028e3-95da-49ad-a8f0-50bd769fbdbc/was_there_ever_a_book_of_enoch_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/68592511354.pdfIn PDF document text
    • http://litezopufesox.epizy.com/vupepovepel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8caef613-94c9-4b05-939d-e2b81375e192/padi_open_water_diver_final_exam_questions.pdfIn PDF document text
    • http://ritofeli.epizy.com/light_energy_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/mole_worksheet_2_moles_to_particles_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4183cf4-8cb2-4187-ac53-6edea8f71b34/learn_korean_free_app.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/33563409141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2b2bb4-4138-4219-a544-cd0de6b84cdf/how_to_connect_two_jbl_flip_4s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2196a2d2-802b-45c4-b1d4-2db1ea7715a5/74667663761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/516de5b5-3807-47ad-9b2a-9754b07b41c0/nespresso_lattissima_pod_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6541732-1e7b-47df-a2ba-a85b5a4b0852/xbox_360_controller_driver_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/annoyance_crossword_puzzle_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e66aeaf-9c4f-43aa-88b8-1a24607704e5/pet_sematary_cat_church.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79a32249-1d05-4b7f-a67b-b1af773a7a90/fasipepixowusasalofanu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00016f14.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16F14 156460 bytes
SHA-256: 9ca7b719aa7c5f78e394dba3617b89f4bf196f4fd56d07e7dd939f61b0c5ffb3
font_00_sfnt_off00014636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14636 4932 bytes
SHA-256: db0f18575dbe43d841ecd624f7c28ff32bd5b05ba4b45addce959b377f7396f3
font_01_sfnt_off000156b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156B6 10448 bytes
SHA-256: 0e9816252692db133f90411e2efb282f97bbdc211ae123f10ac6c7b88205c36b
font_03_sfnt_off00026f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26F80 20032 bytes
SHA-256: 24eee719777f3799eb27d97bef57a1620603ec7b5ced3234c4a6e1fddf87ce2a
font_04_sfnt_off00028bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28BB9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3