Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f59dab8735539c5…

MALICIOUS

PDF

77.0 KB Created: 2021-03-08 23:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dc9a7a36371f14d66f46f2c5fffde7b3 SHA-1: 936b5ea3c8b1a6071a7cec18a9bb347b0635823c SHA-256: 2f59dab8735539c576e3e5de3e54e61941f3bef0f55b6bdd4ba7320b414081c8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/123?utm_term=advanced+piezoelectric+materials+pdf PDF link annotation
    • https://cdn.sqhk.co/fajaleniwa/6ieTTER/game_recording_software_windows_8.pdfIn PDF document text
    • http://techanomic.com/96794745549thm1o.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwasusul/hei1Dig/kagokiboxadomujabit.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/8thbEji/22206641496.pdfIn PDF document text
    • https://luxanuritaz.weebly.com/uploads/1/3/5/3/135346697/mukolevisijaleb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407313/normal_600c81bd17dae.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/igjnjfq/87846740211.pdfIn PDF document text
    • http://vuzitofakomuj.22web.org/87388755619.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/aib1hjr/61707264839.pdfIn PDF document text
    • https://cdn.sqhk.co/tobamozusaj/s2vXhfF/download_preset_lightroom_selebgram_gratis.pdfIn PDF document text
    • https://pupazugosabi.weebly.com/uploads/1/3/4/8/134868946/8204950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_602756eaf2c8f.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/igiwWia/bizukapezegipizamux.pdfIn PDF document text
    • http://tcerkovniekupola.space/enter_the_kettlebell_or_simple_and_sinisterb7jl3.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/gjYAkKN/wiladuse.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/vchgQid/zosufubowukewadegikajunif.pdfIn PDF document text
    • http://werenntaq.online/9919203698e9dab.pdfIn PDF document text
    • http://coupons2020.info/rick_and_morty_comic_bookv914o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sazororazinub.epizy.com/livre_d_astronomie_debutant.pdfIn PDF document text
    • http://pasejisozud.rf.gd/95325968341.pdfIn PDF document text
    • http://xuzomiboz.epizy.com/baaghi_2_film_movie_video.pdfIn PDF document text
    • http://garapaf.epizy.com/activinspire_gratis_ita.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_off0000efe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE5 5400 bytes
SHA-256: 3a6449efcda50461ea5f38b6ce86e912a39e4017e7383596e0fb2a85e5b9dba3
font_01_sfnt_off0001023b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023B 10484 bytes
SHA-256: 98cfbc8788df0ed203c0c6029206bdd5740f439235312f5fcad87f7014658523

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