Malicious PDF — malware analysis report

Static analysis result for SHA-256 271e74a1ef3cbb4c…

MALICIOUS

PDF

110.3 KB Created: 2021-03-23 05:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f602552570501cc24fc2660eb227098d SHA-1: 1deed9bfee2373fb6fa23c1ea6f12919e505cb59 SHA-256: 271e74a1ef3cbb4cd99766dadf256c26295012729aceab1fb84c9a9adf76c2ac
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 0.9947

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=shadowrun+collection+gameplay+espa%25C3%25B1ol PDF link annotation
    • https://tixowofo.weebly.com/uploads/1/3/4/5/134592641/dewixasibade.pdfIn PDF document text
    • http://cupe1.ru/deadmau5_strobe_sheet_music_pianod2q70.pdfIn PDF document text
    • http://insurancesouk.com/agnathavasi_movie_telugu_hd1rv9w.pdfIn PDF document text
    • https://lupoleleki.weebly.com/uploads/1/3/4/5/134516255/1932595.pdfIn PDF document text
    • http://tiruxukanemaga.iblogger.org/lawinen_report_schweiz.pdfIn PDF document text
    • http://usechambre.xyz/bobcat_s650_code_m1706bwdcx.pdfIn PDF document text
    • https://koberowebajufom.weebly.com/uploads/1/3/4/0/134096943/3792404.pdfIn PDF document text
    • http://xteenware.online/gonobaxugexevorovomavogmk0qq.pdfIn PDF document text
    • http://useraisins.pro/relagavotilanalarizormodcl.pdfIn PDF document text
    • http://esmoney.site/photoshop_shortcut_keys_cs6enegk.pdfIn PDF document text
    • http://polfact.site/kesafusofekobefafitumikuzlzc.pdfIn PDF document text
    • http://magazinrf.xyz/25187852495ny9v2.pdfIn PDF document text
    • http://ujjjrrrrr.space/autumn_leaves_trumpet_and_pianouezqd.pdfIn PDF document text
    • https://dejutuzalusabi.weebly.com/uploads/1/3/4/8/134869317/531ea10a5c7.pdfIn PDF document text
    • http://electriccannoz.club/what_god_thinks_when_we_failcmhb0.pdfIn PDF document text
    • http://biweekamnf.com/sat_writing_and_language_practice_fall_2020bfllr.pdfIn PDF document text
    • http://eglo.club/68612719316qxd0b.pdfIn PDF document text
    • http://easylearning.space/junior_project_manager_interview_questions_and_answers20hl9.pdfIn PDF document text
    • http://sesalon.xyz/where_is_the_model_number_on_a_master_forge_grillr9y1n.pdfIn PDF document text
    • http://dasopifumos.iblogger.org/9868133610.pdfIn PDF document text
    • http://mebelintera.ru/zasewewezuzuwikavovuzanix98hup.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
    • https://s3.amazonaws.com/vogubivajavofu/nodelapobupedujibidifij.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/cch_s_dng_gsheet.pdfIn PDF document text
    • http://kotutuvotijol.rf.gd/84088945328.pdfIn PDF document text
    • http://lirepemewepe.rf.gd/dekexo.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/12800164.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E83 5880 bytes
SHA-256: a145a51f1671e266720289c4767bd3744b6a711d089adbc1d917f192f273c285
font_01_sfnt_off00017224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17224 12020 bytes
SHA-256: 87ac0edeb40e3a34d1fe48a56c42cbf1dacde34a51248226772c82535c499b4e
font_02_sfnt_off00019b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B34 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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