Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e0e70c3c6fba0b…

MALICIOUS

PDF

74.8 KB Created: 2021-04-03 03:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f4d738292df8a942119519eca642acd5 SHA-1: af539d94a37a6bb602ac2b72f77cdd0bcf202629 SHA-256: a1e0e70c3c6fba0b39dddfacec3f2978e657aee9917c2fcb94975afb3c09b3ee
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 0.9998

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://vilenefex.ru/award?keyword=blank+world+map+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418013/normal_5ff01a15da456.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/what_is_ancient_greek_art_known_for.pdfIn PDF document text
    • http://jibesikore.iblogger.org/5505988031.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwipem/b32idge/merge_super_car_apk_download.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/dewakoduvinunowap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447263/normal_5ff75a3938da3.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/fDTgdmu/33879063664.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/ebed6abf-62c6-4464-ab40-53986d912a40/what_is_the_book_beauty_and_the_beast_about.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/assuring_the_quality_of_volunteered_geographic_information.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/sorotixe.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/61007447140.pdfIn PDF document text
    • http://tizeruxabono.onlinewebshop.net/cheats_for_gta_5_pc.pdfIn PDF document text
    • http://sedegagagojuwej.epizy.com/whirlpool_duet_washer_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b992775a-795a-47d1-b982-598a6771afcf/panasonic_viera_remote_app_not_finding_tv.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_off0000e5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C7 5212 bytes
SHA-256: cc42fc30d40303198c43095cb2a8e2211d9e6aea607a6999b29a6c693260612d
font_01_sfnt_off0000f782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF782 11064 bytes
SHA-256: f74adf8bc43dca14de3938500b7341437861118639a61352a6996a7074966147

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