Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e810818d85c7476…

MALICIOUS

PDF

86.6 KB Created: 2021-03-20 04:21:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2298ad0ed0175b84951c82a5ebc89939 SHA-1: 2245d7c988762308b17a9cf0edf31090fd7a12aa SHA-256: 5e810818d85c74764a55fef8ff8f04e56290c6eeb3fa86f7efe02bad1709d495
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing or malware distribution attempt.

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://jacksth.ru/wix?keyword=whole+foods+primary+marketing+strategy+2018 PDF link annotation
    • http://palawawez.mypressonline.com/lugagagizevelutej.pdfIn PDF document text
    • https://cdn.sqhk.co/xiselaza/m1ghBid/48937314598.pdfIn PDF document text
    • http://zukirudon.mypressonline.com/gaxesamojakuv.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/cadbury_nigeria_plc_annual_report_2020.pdfIn PDF document text
    • http://zarumesa.mypressonline.com/30325714847.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/xImgwjj/jedesupokesesikar.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/42414487941.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/33633127833.pdfIn PDF document text
    • http://dakajak.medianewsonline.com/critical_theory_today_a_user_friendly_guide_second_edition.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/jbl_flip_3_will_not_turn_off.pdfIn PDF document text
    • https://cdn.sqhk.co/baxikomo/gfidhcN/zapipezuliweguzixopa.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/pebijoru.pdfIn PDF document text
    • https://cdn.sqhk.co/zubafena/gM4Ijde/61476459315.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/i6hiqo1/94038327138.pdfIn PDF document text
    • https://cdn.sqhk.co/vorinugobol/bjdslNu/sakunodudepiwefupinoxava.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/electro_pneumatic_solenoid_valve.pdfIn PDF document text
    • https://cdn.sqhk.co/jumivosokigo/KiijiqU/sniper_ghost_warrior_4_download.pdfIn PDF document text
    • http://vesajob.getenjoyment.net/vizio_vx37l_screen_adjustment.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/CZihjs6/zujaropexokusut.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/lorex_eco_stratus_network_connection_failed.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/31884846215.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/72836594347.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/hi_point_9mm_carbine_trigger_job.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/susaroxikuj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000facb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACB 6156 bytes
SHA-256: 4ae62aefcd1403edd4090b5e25c2e717c33dde18134f47dfa9b8c1b585fac967
font_01_sfnt_off00010fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB1 10852 bytes
SHA-256: dd311dd8e1c9e4dc1dda359daa006ddf2fa38e839819badb70b2c2912e2c2982
font_02_sfnt_off000134e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E9 16632 bytes
SHA-256: a0f721931e8d46909a5774dfc5fef3f121ae0007caac5936856919a4d872074d

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