Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d938ee1397830d…

MALICIOUS

PDF

76.3 KB Created: 2021-04-22 07:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 04e24705303d5e6a48aa526121f66282 SHA-1: 1f595e8b70738f2b2ffd3a015bc49646c2129bf0 SHA-256: 74d938ee1397830dfaacae1506b0cf8449df04d54dd7e0f5dbd3e311b6b9dcb9
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 0.9990

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://dafemum.ru/strik?utm_term=new+fifty+shades+of+grey+2020 PDF link annotation
    • http://wavepolabipal.22web.org/ccw_cisco.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/cicvjiW/swing_chair_with_stand_for_bedroom.pdfIn PDF document text
    • http://zathkatow.xyz/libro_de_biologa_1_de_secundaria_2019_contestado5pkw1.pdfIn PDF document text
    • https://cdn.sqhk.co/wunasesev/gjigicc/72116600601.pdfIn PDF document text
    • http://fumigatoff.online/2007_yamaha_ttr_125_manualwbait.pdfIn PDF document text
    • http://uspex22.online/food_wars_season_5_episode_13_wikijozg3.pdfIn PDF document text
    • http://forkidsshop.online/tinkercad_arduino_tutorialccg87.pdfIn PDF document text
    • http://rawenspant.online/estudio_biblico_sobre_que_es_el_reino_de_diosok9a7.pdfIn PDF document text
    • https://cdn.sqhk.co/kugugofawaz/jermid3/fakati.pdfIn PDF document text
    • http://santecmb-sarl.com/platos_dialogues_bookelvnq.pdfIn PDF document text
    • http://nofixeb.iblogger.org/community_acquired_pneumonia.pdfIn PDF document text
    • http://new-leggins.site/expositor_s_bible_commentaryu526l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_6223cfcd846d49b98afcc1beb0808008.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezetega/machine_learning_coursera_python_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/kanipibezereg.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/51569596749.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/the_greatest_love_of_all_piano_sheet.pdfIn PDF document text
    • http://sudabepogulu.rf.gd/newborn_assessment_format.pdfIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_49f5e2836347464284d72f1dd71a191f.pdf?index=trueIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_9febdf64c490470b866afdadea3d2783.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/limewub/39415122120.pdfIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_b99f81aeea254b29b70517ecd6a3ac90.pdf?index=trueIn PDF document text
    • http://zaxukesaludu.epizy.com/santa_cruz_bikes_sizing_guide.pdfIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_1846b405c3b64e2cbb31c0390d3216f2.pdf?index=trueIn PDF document text
    • http://pasexojubil.epizy.com/fodors_chicago_guide.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_off0000e9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E2 5572 bytes
SHA-256: 94bf65a5a2b4835724ba55cf96720bbd81fe082af26409f6a62edb4563809dbe
font_01_sfnt_off0000fcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF7 10880 bytes
SHA-256: 97db9b4c652043c521433e6a5367040ca7f5696dcc4fbcc36fc477758be8a3b0

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