Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e97501d8a4c05d…

MALICIOUS

PDF

73.0 KB Created: 2021-03-11 22:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: cb9d27ee58c6ddd1cf777af66acc5acd SHA-1: 9e18c6bda2a3dd1281acebc8a759143cd056b836 SHA-256: 67e97501d8a4c05d7b6627bd5248c4501c6ee3e629f6e9841366250db918d758
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The primary URL, https://xezojetit.ru/wix?keyword=prison+break+season+4+downloads, is designed to appear as a search result for a popular topic, likely to entice clicks. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wix?keyword=prison+break+season+4+downloads PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422909/normal_60427dcfb9470.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/epjabii/lokupobeka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477629/normal_6047b96c26160.pdfIn PDF document text
    • http://tokio-2020.fun/fufamixis8i71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367296/normal_5fff2e7f341e6.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/Je9QgiF/sky_racing_race_cards.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_6037184e82147.pdfIn PDF document text
    • http://webmastervlad.ru/jodoziviretio7b0a.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/gjhiqZv/among_us_kill_sound_download_mp3.pdfIn PDF document text
    • http://gogotmif.space/another_me_hd_movieu692e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_603e1ea3985b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393197/normal_603e5fc521685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_60219c2599741.pdfIn PDF document text
    • http://opensalle.xyz/tebulenuweq2ap5.pdfIn PDF document text
    • http://triple-doska5.club/mathematical_analysis_walter_rudinly30y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485321/normal_5ff8cb173eb6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494648/normal_602102c0772ba.pdfIn PDF document text
    • https://cdn.sqhk.co/murerezusa/ieLiagc/historical_place_taj_mahal_information.pdfIn PDF document text
    • http://d-youtube.com/135349222062artv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://81da36f4-dec6-4bf4-836b-19ed67500659.filesusr.com/ugd/5fd5c1_29ca8c8978e142e7b225f06c4c464de0.pdf?index=trueIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_05c0cf82585941dda13767f70e9f345b.pdf?index=trueIn 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_off0000e281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE281 5204 bytes
SHA-256: 49012cf22c4f5246963acd5df622bd7c5fd1805859e3270fe605d93116c2a1eb
font_01_sfnt_off0000f45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45B 10080 bytes
SHA-256: fe5ae6b57471b0f711ac9c3314870121ad9fb46c2d407690836c10d0be4a64a6

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