Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eea3ba0827dc034…

MALICIOUS

PDF

107.4 KB Created: 2021-04-24 07:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c0c8144909923382a9b5f31f3b38be11 SHA-1: d922e928ce65d9dfcacdb26d9fe1697cf638f399 SHA-256: 9eea3ba0827dc034026f39cfb7db0aa857a0936e06f69573a2f2b92995c8c248
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 0.9989

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=zig+ziglar+selling+youtube PDF link annotation
    • http://tomandbxof.site/soda_player_chromecastg8ins.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/54685679248.pdfIn PDF document text
    • http://kilagine.22web.org/xorexejatitobafudufigev.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/online_converter_image_to.pdfIn PDF document text
    • http://kevifiregerufug.scienceontheweb.net/xoguzokuromexawepuxi.pdfIn PDF document text
    • http://titanof-filtr.ru/3536787014t59b4.pdfIn PDF document text
    • http://lukunezevowazol.sportsontheweb.net/air_pollution_control_devices.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/kulozawe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366009/normal_600496709841e.pdfIn PDF document text
    • http://neyroskakalka.site/players_handbook_dungeons_and_dragons_5e3gvxa.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/loxefisuvokananojepoler.pdfIn PDF document text
    • http://duvejiwuxikon.getenjoyment.net/what_is_the_correct_order_of_operations_when_calculating_data_in_excel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_6000783c807aa.pdfIn PDF document text
    • http://beamorem.com/tageforabupaleruxowavimitaut2j.pdfIn PDF document text
    • http://ellmax-site.xyz/the_wolf_of_snow_hollow_spoiler_reviewmy14u.pdfIn PDF document text
    • https://go.bestbookbits.com/freepdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mowadavukusut.epizy.com/sears_kenmore_progressive_vacuum_cleaner.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/wobibi.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/zagusebexa.pdfIn PDF document text
    • http://pigumomibi.onlinewebshop.net/95639979219.pdfIn PDF document text
    • http://xiwamunotop.rf.gd/wheels_of_life_by_anodea_judith.pdfIn PDF document text
    • http://lokuweva.rf.gd/applied_behavior_analysis_3rd_edition.pdfIn PDF document text
    • http://nubibubimalepik.atwebpages.com/calligraphy_free_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14567 5104 bytes
SHA-256: bce22aa86a0fff634e76fabc282dc109cb5a5e71e1c57554666be4c7220fb3e0
font_01_sfnt_off000156db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156DB 3008 bytes
SHA-256: acf7d9861d8d82245f597c09b19d56214759b0442b82a7f17518e499c823f8f1
font_02_sfnt_off0001638d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1638D 10996 bytes
SHA-256: 396a69033966b0200f0701d4d19a559f4c7539503b5c397ea23f1c218dad8a83
font_03_sfnt_off00018908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18908 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2