PDF malware analysis — malicious · 68534141c1aa80ce

MALICIOUS

PDF

66.6 KB Created: 2021-01-23 13:09:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2c9f9e2dcd66116e5c1cc5222c8a50c6 SHA-1: 899d1faa39b500d7101f1e70f4e2ee8bf2e8af7b SHA-256: 68534141c1aa80cec675810253d966f012f207c49ff118a4d11378e6f98305a3

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a malicious PDF that contains numerous embedded URLs pointing to a link farm. The PDF's structure and the presence of external URIs suggest it is designed to redirect users to potentially malicious content hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.7832

Heuristics 4

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
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://bologen.ru/aws?utm_term=donacloney+primary+school+inspection+report
- https://site-1177831.mozfiles.com/files/1177831/gifunudoduvepibiramivajo.pdf
- https://site-1166603.mozfiles.com/files/1166603/waforizapivulusif.pdf
- https://site-1178022.mozfiles.com/files/1178022/block_craft_3d_building_simulator_games.pdf
- https://site-1176040.mozfiles.com/files/1176040/61674064846.pdf
- https://site-1198047.mozfiles.com/files/1198047/swatch_phone_commercial.pdf
- https://site-1219965.mozfiles.com/files/1219965/dmt_trip_report_breakthrough.pdf
- https://site-1208413.mozfiles.com/files/1208413/jarimefasulerorofa.pdf
- https://site-1172092.mozfiles.com/files/1172092/shark_ion_r75_manual.pdf
- https://static.s123-cdn-static.com/uploads/4496818/normal_60047ac2f2d96.pdf
- https://site-1244597.mozfiles.com/files/1244597/ecolab_australia_msds_sheets.pdf
- https://site-1171905.mozfiles.com/files/1171905/32486836295.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://zopatirek.epizy.com/41471290835.pdf
- https://s3.amazonaws.com/viboxikuz/rigajilinajipulon.pdf
- http://mafakizukizunof.epizy.com/jesezemoxepedape.pdf
- https://s3.amazonaws.com/nisiwanolom/flutter_text_form_field_background_color.pdf
- https://s3.amazonaws.com/xarojapi/android_games_online_with_friends.pdf
- https://s3.amazonaws.com/nonipesikiri/afterlight_2_free_apk.pdf
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cf2b.bin` `0deb380998580aa9182909d71c98d5d827f5e6716c30eef27c0c6a028daba609`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF2B	5060 bytes
`font_01_sfnt_off0000e034.bin` `054bfd319cd21d8c11b9c9ccb2b0ca4f266de10aa0a286f3f1df4b581964ca4f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE034	10596 bytes

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