Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c26189b3a44584…

MALICIOUS

PDF

73.1 KB Created: 2021-04-08 02:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a392c9a7a813942bef8e1cfc016db502 SHA-1: 2b411151b057a80553798b240975158023711ab7 SHA-256: a5c26189b3a44584f264ddb6a8998e3d6671ff6c5528e179191312c6d98c3071
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 0.9993

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://zajinet.ru/123?utm_term=empty+number+line+pdf PDF link annotation
    • http://secureappeal.com/53289798920j95cw.pdfIn PDF document text
    • http://usejus.club/movozajawafadasupibigisdy69j.pdfIn PDF document text
    • http://globalsafegroup.com/62257607412bgd0l.pdfIn PDF document text
    • http://fly-drive.online/brute_electric_start_lawn_mower_reviews6vuq9.pdfIn PDF document text
    • http://espaceabonnes.com/dubejogapilebetolipuphvy88.pdfIn PDF document text
    • http://bluhgang.best/2nf_vs_3nf_vs_bcnfvrtl2.pdfIn PDF document text
    • https://cdn.sqhk.co/dezuvosowato/jhhgWic/pufibinopejegelofakino.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/hiBifpm/18744001178.pdfIn PDF document text
    • http://tikovg.xyz/23464935741n0v5g.pdfIn PDF document text
    • http://rankingcoach-apps.com/genodedamifadebusowuo7s6x.pdfIn PDF document text
    • http://prosale.company/322465139880h368.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/jcujeje/rocket_royale_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/ZehgVb2/tokyo_2020_olympic_sports_trivia.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/jetivejilugiliwerstlnu.pdfIn PDF document text
    • https://cdn.sqhk.co/wovenebi/JjcpjbZ/best_cordless_vacuum_cleaner_for_thick_pile_carpets.pdfIn PDF document text
    • http://differencecheats.net/viral_carcinogenesisgnneh.pdfIn PDF document text
    • http://sport-stavki.fun/477831265625200s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mutirexa/barisan_para_mantan_lagu.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/48192317376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d05c219e-cc5a-41f7-8e94-89be84f87326/resumen_capitulo_11_un_grito_desesperado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0458223e-40b0-4b42-ab62-682d3d674814/loloz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/741e40b7-77da-4ee9-9bf5-bdadaeb68e75/65130498030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/703110ca-9387-48f4-9703-e06f991af0f1/wusemekivovowagijezexejot.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE266 5000 bytes
SHA-256: 6fac1d7de013c52a06122492cc4ff5b4e1fa0d63060e9b95d0118df72aef70f5
font_01_sfnt_off0000f356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF356 10592 bytes
SHA-256: 0e86029f24be36041865757ae3f4fbe1f93d8fecdc3fe277e8c4a013d503d94a

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