Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efef0b2052d04f2…

MALICIOUS

PDF

96.4 KB Created: 2021-03-25 14:15:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e5c5eafa74de61dbb265a06c96df06d4 SHA-1: b8dc6610ea8b87638697c1c504057ca8e159b130 SHA-256: 0efef0b2052d04f285811aeb1554c66d79d43b46547367b65558a4a22b28a865
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://gimoguvi.ru/award?keyword=bacteria+clostridium+difficile+pdf PDF link annotation
    • https://cdn.sqhk.co/vexagajezesa/Rmzblid/evaluating_variable_expressions_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/fHaeghP/qubool_hai_zee_tv_serial_ringtone_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/segenoliz/idUYMhg/zoolingo_preschool_learning_games_for_toddler.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/idgd2IY/biwezikejijojidis.pdfIn PDF document text
    • http://liketime.fun/unfollow_pro_for_instagram_mod_apk_downloadmragd.pdfIn PDF document text
    • http://nenegifivujaxu.mypressonline.com/what_is_the_most_common_city_name_in_the_world.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/tikeroramogu.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/vY1rRia/mosazogijowametunikovama.pdfIn PDF document text
    • http://iqecoportal.ru/94663839325z97lf.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/13965225931.pdfIn PDF document text
    • http://daravto18.ru/4_pics_1_word_daily_puzzle_chilesr20o.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzokikili/Figboia/milopulimugujeborov.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://uploads.strikinglycdn.com/files/479832e5-2e90-42aa-90b4-6abad7d8cfbc/rezuxabokijopokifolo.pdfIn PDF document text
    • http://pifujisebakiju.epizy.com/31007888424.pdfIn PDF document text
    • http://magisavupuwikiv.rf.gd/papulipabogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce4340f1-de55-4c33-8f3e-7c1dfba8d887/15350757131.pdfIn PDF document text
    • http://nimunofat.epizy.com/sam_monaco_informatique_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f910627-02c9-4f4b-bab5-0740fa92869f/your_zone_loft_bed_assembly_instructions.pdfIn PDF document text
    • http://zumozitaporoka.epizy.com/bebemugivaz.pdfIn PDF document text
    • http://diduwodiwobe.rf.gd/habanera_carmen_partitura_piano.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_off000125f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F6 5124 bytes
SHA-256: 44f457afe5e1f918955bde1cc35933754a8d94aafc9716c3ff962e0e945034d0
font_01_sfnt_off0001375e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375E 14804 bytes
SHA-256: d5a5341ac9653c53f324b00245be47805a50c05e1fa1d7a0ba6ba783f1f4b378
font_02_sfnt_off00016401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16401 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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