Malicious PDF — malware analysis report

Static analysis result for SHA-256 499db76ff879e3f0…

MALICIOUS

PDF

69.6 KB Created: 2021-04-27 18:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6ab1b16b34ea64725e8a76dc5704bef4 SHA-1: b2d5f395ca269142278e62c13f753f1fb99ee21d SHA-256: 499db76ff879e3f01de61f67b1a33a4c654e8132237baee5bd4d0b66e04893c6
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 0.9993

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://resalured.ru/strik?utm_term=rope+tying+for+rock+climbing PDF link annotation
    • http://zokumujanuni.iblogger.org/husqvarna_61_chainsaw.pdfIn PDF document text
    • http://xviiivbgz.com/wall_street_journal_canadaca4j4.pdfIn PDF document text
    • http://potoborotagivud.22web.org/scattergories_list_4_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/jdQZhiI/guilty_gear_strive_beta_sign_up.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/11218056789.pdfIn PDF document text
    • http://sodaapp.pro/are_test_centers_openjuj21.pdfIn PDF document text
    • http://wisatemubudu.medianewsonline.com/gopro_hero_4_silver_4k_vs_1080p.pdfIn PDF document text
    • https://cdn.sqhk.co/wefonasifaza/icNVthc/snes9x_ex_pro_apk.pdfIn PDF document text
    • http://1eyvgo.xyz/5563651645653qcn.pdfIn PDF document text
    • http://wersita.fun/problems_from_philosophy_rachels_3rd_editionb1zy6.pdfIn PDF document text
    • https://cdn.sqhk.co/tonufipu/fIjaqie/age_of_apes_discord.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/32929066430.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/CbT1ghp/everfi_module_5_credit_scores_answers.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/futamo/sixibexebubebuxujes.pdfIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_b5932d487f3746d7b2fba82452a93aa1.pdf?index=trueIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_935821d2e1714bcf910f8b5fdbe4a894.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/8900805308.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/nonulebixizuxeweda.pdfIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_50ea2617397948d3a4c2a0d3f0ce3852.pdf?index=trueIn PDF document text
    • http://lewinozed.atwebpages.com/certification_of_trust_california.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/46030334091.pdfIn PDF document text
    • http://xoxudexutuku.rf.gd/vasudevan_biochemistry_free_download.pdfIn PDF document text
    • http://wororezijetixa.atwebpages.com/napiritiwosan.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_off0000d47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47D 5260 bytes
SHA-256: 7606751d59d31aedd711c3688e9de1cfd951ae74ab50b24585550270f86bb198
font_01_sfnt_off0000e66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66F 10116 bytes
SHA-256: 44d2db9b08c399404ab727c9a9cf37dd8a8849ba9dfd1a286cab9b95f81da2bf

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