Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9fa8d24fdf4bd10…

MALICIOUS

PDF

66.6 KB Created: 2021-03-09 12:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2fecb6d329bf6fbd35cc8515a02a12c2 SHA-1: ea2a18a19ca6abcde77e69409842ef4c0cc2b569 SHA-256: b9fa8d24fdf4bd10e663de3cc12a2443e1d72cce424354f0f6fe78a4de757e12
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.8526

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 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
  • 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/aws?utm_term=yaesu+ft+2900+manual+portugues PDF link annotation
    • http://copyrighthelpbusiness.net/tsunami_hollywood_movie_tamilgrwby.pdfIn PDF document text
    • https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/duwebakovegebu-jiwisix-poduzoboviwu-zitobufube.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/jihMXie/food_wars_season_6.pdfIn PDF document text
    • http://rankingcoach-apps.com/a_sp_ka_full_form1c8hw.pdfIn PDF document text
    • http://ogranicbio.space/widapaxarokuderuroue9yf.pdfIn PDF document text
    • http://bubble1.space/922901946930hzky.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/ZjaSpjC/call_of_sniper_final_war_download_apk.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/jawomavetoxoxezo.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/XwEzXjj/best_armor_mods_minecraft_1._15._2.pdfIn PDF document text
    • https://mujabimebedegi.weebly.com/uploads/1/3/4/2/134234846/tuvefe-xovudubax-wudasivudiv.pdfIn PDF document text
    • http://usesalle.xyz/is_9000_dollars_a_lot_of_money4pugz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_85e32287a79a464e88d47c5ee9dc6679.pdf?index=trueIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_5441e8af68b743d98a46f742367022b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pirosisob/best_guitar_song_chords_app.pdfIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_5b532c151d1749f59a9b403637bd5266.pdf?index=trueIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_b217cc437b2e479f9a34270188382cdb.pdf?index=trueIn PDF document text
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_9f63784579ce408ab68404bcd41d5511.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/7466458082.pdfIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_5c2985a6d11f4e5cb722e324bd7f5d45.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF01 5612 bytes
SHA-256: b644a330d25fbabc7b17584fb946b6949ea5aa26c9236f04366d9ce1225092f9

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