Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2ffb6466e57ddb…

MALICIOUS

PDF

78.3 KB Created: 2021-03-09 21:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8532fc650d73145c4a37a22371798c66 SHA-1: 9d357b17bb268686f19e41707d9c7a1fb6de6bd6 SHA-256: ab2ffb6466e57ddba93778eaf40b1384a0a3e45a22224eb0f61bec90b010ea45
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 0.9992

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://xajibur.ru/strik?utm_term=how+to+read+oxygen+flow+meter PDF link annotation
    • https://vesabigixovo.weebly.com/uploads/1/3/1/8/131857304/783136b89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_5fd7c3273f8f9.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/wrryjh7/96821263980.pdfIn PDF document text
    • http://maska-respirator.shop/92147345366t3pgm.pdfIn PDF document text
    • https://wofapebubedidu.weebly.com/uploads/1/3/4/5/134524968/9597319.pdfIn PDF document text
    • http://tiktokfrance.fun/5336037342pb3c.pdfIn PDF document text
    • http://bigno.space/67634492765afc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455669/normal_5ffe83e5e7443.pdfIn PDF document text
    • https://rizibibaruf.weebly.com/uploads/1/3/5/3/135383358/kisusowijad-gojenomezux-sabuxagiv.pdfIn PDF document text
    • http://healthyforczechrepublic.site/racing_rules_of_sailing_appendix_uwvjjf.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/3dJZXr7/nature_sounds_sms_ringtones_free_download.pdfIn PDF document text
    • http://erogan-columbia.site/aidin_salih_gerek_tp_yitik_ifann_izinde_indirczwhh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489035/normal_5fd17dd17dac0.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/MEZHijq/sago_mini_super_juice_game.pdfIn PDF document text
    • https://viferoxabuged.weebly.com/uploads/1/3/4/2/134235394/diliwusavo.pdfIn PDF document text
    • https://vemosigexirapi.weebly.com/uploads/1/3/4/3/134387812/luxukigukam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384461/normal_60069c2f1bad0.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/ptibWnH/stand_together_die_together_meme.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d34b0f-cd96-4f5e-9c6c-2f5f502f9f9e/5_paragraph_opord_example.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/vigufizezazisabiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae6a3c35-bbe3-48f7-b491-d0ab3adeb35b/descargar_contrato_de_arrendamiento_de_vivienda_urbana_minerva_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/vavokuvegijepikawuzafow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8213a21-1e56-41e1-8a2c-21ff0bc10e7d/27692972573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d24f9470-c941-432b-abcf-ad0b52934253/zomigubax.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/barcode_scanner_icon.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_off0000f37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 5272 bytes
SHA-256: 18ce4845cc8c67f04633824358424b6b05089f58b4285bbcd9f92ee4606d3ba1
font_01_sfnt_off00010575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10575 11572 bytes
SHA-256: 6096835325c258a917934e59eb6de235c1f25e47527f801d3444f628a3891b95

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