Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8498dc963d84b67…

MALICIOUS

PDF

110.9 KB Created: 2021-05-09 00:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 960a145ce48a1f2bee3afef3f839a533 SHA-1: 5735dbb72e4cd7f694ac1df1073b3cf1d3f89263 SHA-256: a8498dc963d84b6752465d8aded8cff76d26fb8da6bd5cfd723b790986e05194
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 0.9996

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://botokaw.ru/strik?utm_term=jaybird+x4+vs+bose+soundsport+wireless+reddit PDF link annotation
    • http://gasurorir.sportsontheweb.net/secondary_amenorrhea_treatment.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/how_to_change_icon_pic_on_iphonentx16.pdfIn PDF document text
    • https://cdn.sqhk.co/guzikiku/ieytjhg/69492785921.pdfIn PDF document text
    • http://salonapp.xyz/12245540385bs1kp.pdfIn PDF document text
    • http://zoneeuro.pro/sopixotiverbsa7r.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/d0NIphe/didezopiwepeforomufimim.pdfIn PDF document text
    • https://cdn.sqhk.co/pikikunifav/jhicIhh/python_programming_cheat_sheet.pdfIn PDF document text
    • http://wodedutipif.medianewsonline.com/africa_toto_choir.pdfIn PDF document text
    • http://fionainthefield.org/psychology_in_everyday_life_4th_edition_free55wrh.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/emperor_grandfather_clock_chimes_not_working6zh0y.pdfIn PDF document text
    • http://fakts.design/51287052158ch5qt.pdfIn PDF document text
    • http://hookup154.site/head_first_pmp_4th_edition_amazonp60aa.pdfIn PDF document text
    • http://cesaregaspari.com/rikemutugugavumy8zx.pdfIn PDF document text
    • http://1xbets-reg.site/what_skilled_trades_are_in_high_demanda91og.pdfIn PDF document text
    • http://tadefog.medianewsonline.com/english_business_phrases_and_idioms.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/how_to_reset_installer_code_on_safewatch_pro_3000.pdfIn PDF document text
    • http://batmbatm.ru/95967417036dq1zo.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/2aab7a55-a7ff-47c0-b39f-221a3d7139ec/races_of_destiny_3.5_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/239af8cb-ef14-4996-af7c-502f753b89a6/pezezogobati.pdfIn PDF document text
    • http://tikimiwuwal.myartsonline.com/burglary_in_nigeria.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001898f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1898F 20860 bytes
SHA-256: 36fe3d9b22ab64c7b48a409e687f5abb2d483673b40ff569dc858a3c8562d410
font_00_sfnt_off00014df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF5 5492 bytes
SHA-256: e1203d49fd9b8bc86285cecdfc4287efa6d964cd092c9af6a1fc3552031d7d23
font_01_sfnt_off000160d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160D1 11896 bytes
SHA-256: a19079de0debb3bec5d53c2ae74074d151ef7fdea27796995e0e4ce418fe9e2f

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