Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb4b6484fa44949…

MALICIOUS

PDF

75.4 KB Created: 2021-03-19 07:24:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0da2bd68e8663038729ceb6cf0e6f4be SHA-1: 56209ad8d63ecd9a06919a33c064a07415590484 SHA-256: 6eb4b6484fa449497148ae1fb4feab89d8d6ac948eb27346523fe0b737c65065
186 Risk Score

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/wix?keyword=viking+worksheets+key+stage+2 PDF link annotation
    • http://swiss-family.space/fujitsu_model_aou24rlxfz_manualr4ni5.pdfIn PDF document text
    • http://devuweza.scienceontheweb.net/surah_ar_rahman_dan_terjemahan.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/giwazuze.pdfIn PDF document text
    • http://wonder-ita.space/why_is_my_bluetooth_speaker_not_connecting_to_my_macfcv98.pdfIn PDF document text
    • http://posurazatux.mypressonline.com/100_startups_to_watch_2018.pdfIn PDF document text
    • http://mebel-albero.ru/can_i_do_trx_at_homelkhha.pdfIn PDF document text
    • https://vigedinolig.weebly.com/uploads/1/3/1/3/131380992/nolij.pdfIn PDF document text
    • http://stavki-na-sport.site/luces_de_bohemia_selectividadjfkzv.pdfIn PDF document text
    • http://nebofonuve.mywebcommunity.org/campbell_biology_concepts_and_connections_9e.pdfIn PDF document text
    • http://birapemotafew.mygamesonline.org/zotuxipovum.pdfIn PDF document text
    • https://bejolikide.weebly.com/uploads/1/3/1/4/131437094/0b5d0cc247038.pdfIn PDF document text
    • https://mogufujekomepit.weebly.com/uploads/1/3/1/6/131607600/diwez.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/8543306.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/redegelesibif/annunciation_catholic_school_uniforms.pdfIn PDF document text
    • http://mulapoxe.onlinewebshop.net/spanish_learning_files.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/hello_neighbor_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/giraxo.pdfIn PDF document text
    • https://12c21f6a-324e-488c-af83-7e1076049286.filesusr.com/ugd/e84f25_7d06acbebdec4b6a9ff24eee7c000a32.pdf?index=trueIn PDF document text
    • https://a581e706-3bf6-41fb-8978-ad4d4077590d.filesusr.com/ugd/afbe6b_3be7741feef24ff58832efa2422005b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fulazelof/how_to_clean_an_i_coffee_single_serve_machine.pdfIn PDF document text
    • https://e9542b43-fb79-4c62-94a9-c66526381fce.filesusr.com/ugd/4142f3_2120530d9167493a9256f82d23e03ab9.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_off0000e7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BC 5268 bytes
SHA-256: 5904e41f2970b43b0e50e89c8209849d422b13ceb6cabe2516f6e052ed882c8f
font_01_sfnt_off0000f9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C7 10680 bytes
SHA-256: 58e63497dc15da2b6ac720999994a0f99744b38c693fcb992da78b78434d0b66

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