Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37adca80b70fd22…

MALICIOUS

PDF

77.6 KB Created: 2021-03-19 09:00:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e06a08cd019d4f13e42bc6a98ac9380c SHA-1: b0ae66ac82b3bf1dd3d580f4da47caafa48b7885 SHA-256: b37adca80b70fd2236f578748622b68497e6a984b562e88a6c3c48ea49a8f31c
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 0.9996

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://soxebez.ru/aws?utm_term=main+events+that+happened+in+chapter+2+lord+of+the+flies PDF link annotation
    • http://tufodudem.mypressonline.com/determine_quadratic_function_from_table_of_values.pdfIn PDF document text
    • http://vixabaj.scienceontheweb.net/biotecnologia_ambiental.pdfIn PDF document text
    • https://lekifusa.weebly.com/uploads/1/3/1/3/131382118/060439d5.pdfIn PDF document text
    • http://lupazul.mywebcommunity.org/14692920805.pdfIn PDF document text
    • http://art-practice.org/zerakiraburofujewikixqsgo.pdfIn PDF document text
    • http://save50.pro/cotisation_formation_professionnelle_chef_d_entreprisecz8ix.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/33924097777.pdfIn PDF document text
    • http://mexicotop3.xyz/exercice_sur_la_ponctuation_ce2tqs2m.pdfIn PDF document text
    • http://clipshd.design/microsoft_word_update_for_mac_catalina6zn4t.pdfIn PDF document text
    • http://gojewobisizoz.22web.org/94496798198.pdfIn PDF document text
    • http://gagezejiwakale.iblogger.org/connected_no_internet_android_wifi.pdfIn PDF document text
    • https://mupaxezofede.weebly.com/uploads/1/3/4/3/134317166/nakepova.pdfIn PDF document text
    • http://reduslimitalia-official.site/berserk_of_gluttony_light_novelhp23q.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/bipepezuwed/1491_book_review_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/one_bengali_movie_utorrent.pdfIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_f5e0c43dbbf14e38a98b67caf05561b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/telasebisu/idioms_worksheets_for_3rd_graders.pdfIn PDF document text
    • https://f5f74d4f-f804-4d9b-9bfa-9964b2756261.filesusr.com/ugd/e389b3_db60ff6226864aec821b424384e00c2d.pdf?index=trueIn PDF document text
    • http://bavipilebevim.epizy.com/why_my_garbage_disposal_is_not_working.pdfIn PDF document text
    • http://figofubinodafe.rf.gd/sajavalazugajide.pdfIn PDF document text
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_98836a37fef3417ebb4f42c7b3404673.pdf?index=trueIn 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_off0000f151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF151 5440 bytes
SHA-256: 865bf8e9af002f1358292c234d1267a53e7ecc38e28de333ca41cc09f4a3f35a
font_01_sfnt_off000103e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E5 10604 bytes
SHA-256: bc7d2109deac2f524a51a4e354cdccc229588180d4f70e7de8480ffaaac583a1

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