Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de8f30313857f99…

MALICIOUS

PDF

70.3 KB Created: 2021-05-18 11:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eb3aadcbda8e9c1192f4ca0e16dbc991 SHA-1: 7a8d46b5ba2f4367ae3e13d5681874b81bdb12c8 SHA-256: 8de8f30313857f993eda3b102d464ca2b2fa72992113331d8dac25bed6322ec5
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 0.9997

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://xajibur.ru/strik?utm_term=la+gloria+por+el+infierno+aline+hernandez+pdf PDF link annotation
    • http://wewowajawa.22web.org/87896399783.pdfIn PDF document text
    • https://xolopebowuraj.weebly.com/uploads/1/3/4/6/134600193/webizu-mivawojono.pdfIn PDF document text
    • https://dubasebajulux.weebly.com/uploads/1/3/1/3/131382081/lijukelexededun.pdfIn PDF document text
    • https://xanovisawedota.weebly.com/uploads/1/3/2/8/132816091/wojopapar_vemiwinokewigin.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/6618208.pdfIn PDF document text
    • https://jowatewiko.weebly.com/uploads/1/3/1/3/131380225/jorikosu_jutiwibuk_ludumitugoz_tajipamitakaxas.pdfIn PDF document text
    • https://kegovivaxik.weebly.com/uploads/1/3/4/5/134506491/2341303.pdfIn PDF document text
    • https://fupodakabapamom.weebly.com/uploads/1/3/4/4/134489617/cc8abe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gadinupolujuker.epizy.com/bolts_and_nuts_catalogue.pdfIn PDF document text
    • http://bitediwufekoxem.epizy.com/penetration_testing_report_sample.pdfIn PDF document text
    • http://kivevufawonin.rf.gd/17399800878.pdfIn PDF document text
    • http://josejutolaxof.rf.gd/kuvoko.pdfIn PDF document text
    • http://sidakofonol.epizy.com/45289931313.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/69245908445.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/refirugugitamoxabopexu.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/jerubalewuvikubet.pdfIn PDF document text
    • http://vuxalono.epizy.com/listen_audiobook_player_android.pdfIn PDF document text
    • http://nibivikoza.rf.gd/light_on_life_bks_iyengar.pdfIn PDF document text
    • http://foduvikedumule.rf.gd/97493352781.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/fawopirusalez.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/chottanikkara_amme_jagadambike_cut_song.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_off0000d344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD344 5116 bytes
SHA-256: e72805b20871e84c6edb898592846f387b7758e725132ba76f166cd0842cef59
font_01_sfnt_off0000e4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B5 11408 bytes
SHA-256: 2bf8e48c60ef98a16255a781f8e3583c9ba91888a53ab0262cd7648b5fd9e8ab

Open this report in the interactive analyzer, or submit your own file for analysis.