PDF malware analysis — malicious · c8b80e1aeab8bde1

MALICIOUS

PDF

75.5 KB Created: 2021-03-28 16:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 0d9089944969fedece820990b3ae43bd SHA-1: a9800713727b555794939e6f6b85794e58154212 SHA-256: c8b80e1aeab8bde14b38529a4ee8ff0f6b51480533990fc099cd31dde203f29e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though heavily obfuscated, contains text suggesting a lure related to 'nature beauty video'. The presence of many external URLs, including one pointing to a potential PDF download, indicates an attempt to redirect users to malicious content or phishing sites. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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.
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://kuzutuzo.ru/123?utm_term=nature+beauty+video PDF link annotation
- https://lurakowufo.weebly.com/uploads/1/3/4/4/134457973/biwivozajo-nibonifodas-xanewusodanoj.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4479932/normal_5ff668f04845b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4425238/normal_60152e1aa7515.pdfIn PDF document text
- https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/1962941.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375522/normal_605992889db33.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4382960/normal_5fe3208890540.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446490/normal_5ff0403b97617.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4374979/normal_6001ea92c092a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4469105/normal_60005c254f7c5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380540/normal_60480e88bb203.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424347/normal_5fd8cba6eef27.pdfIn PDF document text
- https://fezewemekerod.weebly.com/uploads/1/3/6/0/136050953/zalunepadogexoj.pdfIn PDF document text
- https://nogetutiru.weebly.com/uploads/1/3/4/7/134711470/716b5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4377414/normal_5fdef9f66504b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367019/normal_60252b0d4207a.pdfIn PDF document text
- https://busonuvawariba.weebly.com/uploads/1/3/4/3/134355681/5ad77a5d149907a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4464078/normal_5ffb2a4267a83.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4486034/normal_5fe2e63c9fe2c.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_02c72f89a54f4e95b85d9e85459e1df0.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/widofafane/orlando_weather_report_today.pdfIn PDF document text
- https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_8cf8f4150bb64669aaeb6748a710695d.pdf?index=trueIn PDF document text
- https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_ac99904831464af8ad19f14c2827ca25.pdf?index=trueIn PDF document text
- https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_4f55d2febf614b1a919c3b33a1041624.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/zevutebulaworel/befidumizakofe.pdfIn PDF document text
- https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_05c696aed5ea4c4792caceb14726b325.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eb42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB42	4880 bytes
SHA-256: `85288377158ea1d02061be805be8a4641cd052d64b6d94434a540c4a9e594af5`
`font_01_sfnt_off0000fbfa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBFA	10888 bytes
SHA-256: `58ed9cfeb360a6d60d8e90bd6951bb16788f0744d268b6585fb5e6b777959bb8`

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