Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb13f4cf92e5169…

MALICIOUS

PDF

78.4 KB Created: 2021-02-20 01:04:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 379d662231dfa0cc4207752eed80fa7f SHA-1: f33e332e819f6ebf505a1159ccf703ff8a7ef6fb SHA-256: fcb13f4cf92e5169ce29f14338120996b5e182791fe2669f7f7ced125ed2c5a0
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 0.9993

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://jottigo.ru/strik?utm_term=wh+questions+multiple+choice+exercises+pdf PDF link annotation
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/maxibofax_wiragu.pdfIn PDF document text
    • https://tebukebodo.weebly.com/uploads/1/3/1/3/131381901/vixazulono_renixajim_rerami_jawepaw.pdfIn PDF document text
    • https://cdn.sqhk.co/sagitusat/lGhaiaK/loweb.pdfIn PDF document text
    • http://velesvoyage.ru/38700697139p2vnc.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzokikili/gggjgfj/tik_tok_video_download_app.pdfIn PDF document text
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/e5eddeb528720.pdfIn PDF document text
    • http://cpskras.website/nejamovudufimumotipibuxiuibim.pdfIn PDF document text
    • http://ptmonline.ru/zufikavuy1wr.pdfIn PDF document text
    • https://mixusabap.weebly.com/uploads/1/3/4/0/134096097/xakowawevagilenili.pdfIn PDF document text
    • https://lukuxafibufogi.weebly.com/uploads/1/3/5/4/135400428/kufomojusoja-jepavepimu.pdfIn PDF document text
    • http://gnoogle.site/lippincott_pharmacologyy2ofy.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/OZhhje0/kumaxufeve.pdfIn PDF document text
    • http://nesobaka3.xyz/diffusion_and_osmosis_lab_report_ap_biopigrl.pdfIn PDF document text
    • http://lnstagramsecurity.net/technical_analysis_of_stocks_in_hindi4yagm.pdfIn PDF document text
    • https://cdn.sqhk.co/vumajotiwog/jejfHcP/digital_advertising_jobs_denver.pdfIn PDF document text
    • http://blancop.xyz/xajonudatituwxvc2.pdfIn PDF document text
    • http://trokot-newshop.online/yellow_crown_logo_answernipng.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/jadere/arctis_1_wireless_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/trig_identities_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/ukulele_tuner_senar_3.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/crack_software_for_android_mobile.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EC 2856 bytes
SHA-256: 6a7390c9e634f7f167841a75ffa617ce3f7010ba402b4c06ad0a47e5500b6a59
font_01_sfnt_off0000df16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF16 5392 bytes
SHA-256: 65a31c53c31046067a7e48c3c906d4872793658cd83720052c78087d6cd289af
font_02_sfnt_off0000f14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14C 7696 bytes
SHA-256: 25e184f101257b5f91643ed06749e3beb734ffad76d4de75d57431e1888c0a31
font_03_sfnt_off00010605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10605 11204 bytes
SHA-256: 715b81bcf53491d5eb4aacc1f07187f44145fe23659962948d1c59ea8ce4f0a1

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