Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dee75d9436e304a…

MALICIOUS

PDF

78.7 KB Created: 2021-02-23 00:08:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e901a6cb9c3e59c21d3aa271a9d23e9c SHA-1: bc8e81c95fb2cb94b0724e2aec5a966b34c5f8ff SHA-256: 9dee75d9436e304a90f2d7380a560ae318d171af775cc6c2c747c9b036b9cb3e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI that redirects to a suspicious domain, masquerading as a search result for a common query. This indicates a phishing or scam attempt designed to drive traffic to a malicious site. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/aws?utm_term=why+is+smoke+detector+flashing+green PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411681/normal_60028dc6c64b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_6019342f3c356.pdfIn PDF document text
    • https://bexoxofimimiwox.weebly.com/uploads/1/3/0/7/130775405/tamaniludip_vogivamago.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413119/normal_5fe1c0a19ce8d.pdfIn PDF document text
    • http://tesopinafap.22web.org/24070261255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_5fd2691d99187.pdfIn PDF document text
    • https://livekurot.weebly.com/uploads/1/3/4/4/134443702/tisurug.pdfIn PDF document text
    • http://fisuruwibowin.66ghz.com/bollywood_songs_pk3.pdfIn PDF document text
    • https://jotinebemoti.weebly.com/uploads/1/3/4/6/134681432/4187371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464873/normal_601f43555113e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jokokitot.rf.gd/aifa_ki_full_form.pdfIn PDF document text
    • http://xuramefa.rf.gd/wordpress_download_monitor_404_error.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/how_to_fill_airmen_form.pdfIn PDF document text
    • http://vigukesege.epizy.com/sagobifakaguwojemisa.pdfIn PDF document text
    • http://bupozefi.epizy.com/ruwarajoxexadetokejeve.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/66323102965.pdfIn PDF document text
    • http://bigofufujenu.epizy.com/adivasi_dj_new_song.pdfIn PDF document text
    • http://magakawigola.epizy.com/wudemepiwam.pdfIn PDF document text
    • http://nolutujurevovi.epizy.com/12304128921.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/sekabosulike.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/nogomek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AD 5404 bytes
SHA-256: 29c455e14ac7a92367a4050d214b6cadd560a3425d91cd8020c83854779d9d18
font_01_sfnt_off0000faf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF2 10656 bytes
SHA-256: 57edc39598ebd40b35753cf712ddb930fb0e929932cffd5125beaa30f978cf13
font_02_sfnt_off00011f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F60 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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