Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20f227c55f72377…

MALICIOUS

PDF

81.4 KB Created: 2021-05-05 18:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c55bc2df9562a217631bed763e7d2736 SHA-1: d53d3a8b8408ab0dffee54c60a3ebbdd7cef75f8 SHA-256: e20f227c55f72377f93448c3531ef8a665c1f62169e4861b9fe2dbee2664fd3b
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://pelibifir.ru/strik?utm_term=can+you+make+dough+without+yeast
    • https://cdn.sqhk.co/gubusase/cidjb2f/28602980671.pdf
    • http://firstreadersclub.com/will_a_10000_watt_generator_run_a_housev9fw1.pdf
    • https://cdn.sqhk.co/tijinujul/cEhiKUP/ragdoll_simulator_script_pastebin.pdf
    • http://moscowflowers.shop/duwufesopafefefulibeqv4p5.pdf
    • http://itabody.space/bpsc_answer_key_64th_drishti_iasy9u2b.pdf
    • http://xebobimifu.22web.org/18185208161.pdf
    • http://smartroom.pro/1155840629jfhpb.pdf
    • https://cdn.sqhk.co/noxisoture/xgehdjd/doduxojoxawegineperotoma.pdf
    • https://cdn.sqhk.co/ripalufix/qhijako/the_roommate_rotten_tomatoes.pdf
    • http://gramnews.xyz/balochistan_board_date_sheet_10_class_20194uzyr.pdf
    • https://cdn.sqhk.co/porekige/31z1cgd/light_spinner_finger_toy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/127a8cd0-fd83-4b16-97c6-43b729f72a42/78170069671.pdf
    • https://42172c5f-463d-425f-bc49-3536d5e9b788.filesusr.com/ugd/3e9aab_e324c61e18004bedbe0ae769cb1ee8af.pdf?index=true
    • http://timufumanusu.epizy.com/61069315079.pdf
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_09f9584187d5457eaf7b75d0147f0d9e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5ac0b0fc-7e4a-49a4-8346-d0526718232a/wogotorozubukejipoxubi.pdf
    • http://jokajovasoxaruf.epizy.com/71220044707.pdf
    • https://uploads.strikinglycdn.com/files/850455ac-dac5-4d92-a6c7-8b2f6dfa59ef/the_mist_stephen_king_movie_online.pdf
    • http://kezigukatabo.rf.gd/apc_accountancy_class_12_solutions.pdf
    • https://uploads.strikinglycdn.com/files/cefb3c42-de15-489f-95e9-25123d82d78e/the_raven_by_edgar_allan_poe_critical_analysis.pdf
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_ee39e29ae0984cddb9ffa369910e7801.pdf?index=true
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_db596bee5c9c47b58bf7e48bc1a6f75b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eef0bef8-f649-45cc-b6dc-76df41ae900f/xiweso.pdf
    • https://uploads.strikinglycdn.com/files/0f1383f8-65d4-45f1-9458-d8f136f9e65f/puvofiwopefoj.pdf
    • http://beverotunege.epizy.com/ratelamaziwu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fba5.bin
03e2054b6b71a36a7687223a8e43075be4c9ca76f2a158012c4cd6f8fd9850a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA5 5276 bytes
font_01_sfnt_off00010d8b.bin
4e6d6120d8e1e8037d15132e8f3dece7a3eb16e1703776570647902ef1a047ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8B 12184 bytes

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