Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeed501cd40ff657…

MALICIOUS

PDF

75.9 KB Created: 2021-03-05 00:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 870e9d7b7efb097efc13583aa30e7578 SHA-1: 9ec533dcdde154a0bc128688a96a05384466b2c6 SHA-256: aeed501cd40ff657167286c182f8631f4ff2c6a8009d97b977be23838ea1186d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it's part of a link farm designed to redirect users. The primary lure appears to be 'Suzuki piano book 1 music download', which is likely a pretext for phishing or malware delivery. No scripts were extracted, but the PDF structure and numerous external URLs strongly suggest a malicious redirection or phishing campaign.

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://vilenefex.ru/strik?utm_term=suzuki+piano+book+1+music+download PDF link annotation
    • https://cdn.sqhk.co/tosobulig/Xxegjjm/mipogaxapikolizojew.pdfIn PDF document text
    • http://pidoxabomekoju.iblogger.org/roland_fa-06_second_hand.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/fupidig/pimepegadomuzev.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/yjhhhqu/regal_cinema_movies_playing.pdfIn PDF document text
    • http://kulilezew.iblogger.org/pasofejapusuf.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/vgggHjd/74117831141.pdfIn PDF document text
    • http://lyudi23.ru/zujepepukavoxogomelairnim.pdfIn PDF document text
    • http://itasda.online/videohive_vintage_music_opener_freeoitdw.pdfIn PDF document text
    • http://prodson.space/what_size_is_3_4_classical_guitare9v8m.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/UBhjJcr/digiribixowo.pdfIn PDF document text
    • http://crystal-light33.ru/41332906343wfi9v.pdfIn PDF document text
    • http://summerita.fun/mossberg_500at_shotgunb5nre.pdfIn PDF document text
    • http://weinmvc.net/kezemipomuvu9s0k8.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/XjbSOOb/crafty_crab_sunrise_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/j8uiau5/teddy_roosevelt_statue_defaced.pdfIn PDF document text
    • http://sks-expertiza.ru/sugumazoxe8ps3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejedizanabi.epizy.com/bhojpuri_song_2019_video_mp4.pdfIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_13d3271a78ad4002b3d35901d7c57482.pdf?index=trueIn PDF document text
    • http://wamivofubamaxit.epizy.com/villain_bengali_movie_video.pdfIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_7b4464e6969349f19ff3a0e7da50e7fc.pdf?index=trueIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_36f3701f456e4a1b9931660eab2075c0.pdf?index=trueIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_61852faa2bd84773925fbd5ee769777c.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_off0000ec38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC38 5624 bytes
SHA-256: f5bd8422352fc1ea3a61a76e3d26c6dd6a6b681e954f66d472024452a3c11ade
font_01_sfnt_off0000ff67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF67 10124 bytes
SHA-256: 4c90ab2aba6c71d2bdb02bac710101af9b7619de6099f2812fe1cdaf333653ff