Malicious PDF — malware analysis report

Static analysis result for SHA-256 58aaea769e64d0dd…

MALICIOUS

PDF

81.7 KB Created: 2021-04-03 13:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e4ccd138aaad48ac9356cc902d91606d SHA-1: 533625f26b310b4e2f6494a79477a5fbd49b21d1 SHA-256: 58aaea769e64d0dde25d1534c5108500dc911836207fa0145eab72353a0b82ef
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 0.9995

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://xajibur.ru/award?keyword=the+state+of+anti+plastic+campaign+pdf PDF link annotation
    • http://xebiniseba.mygamesonline.org/lipokufojijeguzibifiwa.pdfIn PDF document text
    • http://kazaxukiga.getenjoyment.net/what_is_the_difference_between_orthodox_christian_and_baptist.pdfIn PDF document text
    • http://nateribebomulaz.medianewsonline.com/statistical_methods_for_categorical_data_analysis_2nd_edition.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/wawadew.pdfIn PDF document text
    • http://mamewebifukuv.22web.org/campos_de_la_psicologia.pdfIn PDF document text
    • http://ladebizelase.scienceontheweb.net/nursing_behavioral_interview_questions_and_answers.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/71741531531.pdfIn PDF document text
    • http://zasazigupat.getenjoyment.net/amaravati_kathalu_telugu_download.pdfIn PDF document text
    • http://kazotapojiwi.mywebcommunity.org/causas_de_contaminacion_ambiental.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://lawiferow.myartsonline.com/mupew.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/zalageje.pdfIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_490b27dcd3f7446aafe238dcc6f0c95b.pdf?index=trueIn PDF document text
    • http://xijovapafibowuw.rf.gd/77520219304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb9c4afd-4c6f-4436-9beb-36fc0d2982cf/luboz.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_bd3c91b20f6644a1a65fcdaf17f8a436.pdf?index=trueIn PDF document text
    • http://wenares.myartsonline.com/guitar_chords_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9629ccb2-7251-4c4a-baae-dab5196c5cba/linker_and_loader_ppt_download.pdfIn PDF document text
    • http://pogotoxevug.epizy.com/saforodola.pdfIn PDF document text
    • https://874c0fd6-92eb-497b-905f-dc7ca4d2e287.filesusr.com/ugd/5ca7d4_ad4567e54929497f8ae9c1318572c5e1.pdf?index=trueIn PDF document text
    • http://sinusisokopex.atwebpages.com/enlightened_absolutism.pdfIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_3ad2f85a9fb545dd93f31b77ee9c87d6.pdf?index=trueIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_081f00da93cf4440b53da920021616e0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41F 5212 bytes
SHA-256: b498b17032febd0d60d356d4a61c216d7228bd9f89bd2dbc675565652ecd0ce8
font_01_sfnt_off000105ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 10764 bytes
SHA-256: 332af55b1b3ab069cc382df6ab8d0cd89847f755dce48c1766f622bf8345ff47
font_02_sfnt_off00012a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A83 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230