Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ee3247b7372eb0…

MALICIOUS

PDF

84.5 KB Created: 2021-04-18 21:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d043115c6cbb4bfde43dc5350ba3f06 SHA-1: ac65d7f65a17fbcb137f3165aa2ad513fa110d6c SHA-256: 22ee3247b7372eb047b206c65d00ebbabe459ba2650e1f0f7d41f6a76c89395f
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external links points to an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=how+rich+are+the+duffer+brothers
    • http://discount50it.pro/jimunodizevcbsoq.pdf
    • http://goldalbum.ru/29305753777ccjxg.pdf
    • http://nesobaka7.xyz/maax_spa_model_7816t5j0.pdf
    • http://shoop-fe.ru/eclipse_neon_2_32_bitr5ou7.pdf
    • http://fishing-rods2.club/dr_care_columbia_sc_rosewoodyotjr.pdf
    • http://varistop.site/free_nds_emulator_for_android_6_apkwwzx3.pdf
    • http://itverys.space/osha_safety_training_videos_spanishgyhft.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2ddf8be6-044d-4f30-b6fd-16c032829cd6.filesusr.com/ugd/9827ea_815e7f5a533946598e6993fa0619fd14.pdf?index=true
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_4e360f7033ae4fce82554fdc37ca90e1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c241ed86-223d-45ec-815a-6bacc4932c46/9087726444.pdf
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_b59d3dbecb254d0aa212b999b05dc934.pdf?index=true
    • https://uploads.strikinglycdn.com/files/501dc44a-82f9-43fd-b580-09bb49dc1137/boxebuxibukiterumomile.pdf
    • https://uploads.strikinglycdn.com/files/5b9f07fa-9909-425b-84d4-dc3e02c02f60/chi_st_joseph_health_jobs.pdf
    • https://uploads.strikinglycdn.com/files/29ee7ea7-2be0-4b62-a987-1af550c6b640/xaxidenakifew.pdf
    • https://uploads.strikinglycdn.com/files/03dfbaba-ff7c-49cd-a122-1230d4fec1f9/how_to_get_a_cdl_in_oklahoma.pdf
    • https://uploads.strikinglycdn.com/files/c6228e01-7d90-48e6-95bd-c3f02b1cee68/call_me_by_your_name_novel_age_rating.pdf
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_3f6905ca13424faf9e7e328d6e2fda72.pdf?index=true
    • https://uploads.strikinglycdn.com/files/47f61def-93ba-484c-b913-db4282fb3a96/67913889614.pdf
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_3a289120d8ca49559b7106157b9cdff9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b709b44f-db7d-42c7-8386-3ab401b04d0f/estructura_externa_de_un_texto_cientifico.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc11.bin
93ce35c94bacef6568c7b4c4a673a286912e0defd8814c3bbc6e5dadc29dad4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC11 5268 bytes
font_01_sfnt_off00010e01.bin
a7c5a0f791288ec0e82f0b8f06c43e61ddceff2eebd082596a43887292e0244e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E01 3516 bytes
font_02_sfnt_off00011ba5.bin
7be294fcb2134fdb51a0008c0401cbac1699c89770d0a8b8956ed6cf0d6dd77d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA5 11740 bytes

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