Malicious PDF — malware analysis report

Static analysis result for SHA-256 8901f3805db471fc…

MALICIOUS

PDF

98.7 KB Created: 2021-03-25 14:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 29d24e2d9a9b9042c5500a7d9a14256b SHA-1: 60651039138b7b1337b66493ef855ed29106fb2d SHA-256: 8901f3805db471fc4d08fe203dba2ba93cff1d3f2a61127a0093c13547daa1a5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a malicious redirector link that points to an advance-fee scam lure, suggesting the document is designed to trick users into believing they are receiving a valuable document. The ML classifier strongly indicated maliciousness, and the document body, though heavily obfuscated, contains keywords related to asset management and industry PDFs, reinforcing the lure. No scripts were extracted, but the presence of a malicious redirector implies an attempt to download further payloads or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://dafemum.ru/award?keyword=global+asset+management+industry+pdf In PDF document text
    • http://interbankdigital.com/jowaxedaponxisno.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/how_much_does_an_ethical_hacker_earn_uktmcxy.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/1b0jejf/paypal_customer_service_email_spam.pdfIn PDF document text
    • http://opensalon.xyz/is_qa_tester_a_good_careerij8gt.pdfIn PDF document text
    • http://bu-markett.com/cuales_son_los_sintomas_de_problemas_del_rioneswpcw7.pdfIn PDF document text
    • http://trells.space/wedakizljx27.pdfIn PDF document text
    • http://katermore.ru/202197318605rxlo.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/ghjiii0/sajinapojizevudisudog.pdfIn PDF document text
    • http://construt.site/what_happens_in_city_of_lost_soulszvgdf.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/aroma_8-cup_rice_cooker_and_food_steamer_manual1wkyz.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/OhgxhcB/bojerexuluvubalov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/donarepemi/50386014993.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/vikaruripubunoposiba.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/karimukilenupinimuvek.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/nipetetomi.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/ruruzulikexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8bd621-7a4d-45a7-8e78-b45675ebc10a/is_the_shack_available_on_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/chrono_trigger_rom_gba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56fa17e3-de4e-4474-afcd-f1b3ff4ac9e9/nomejemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/920f8cf1-cfa9-419b-9ea7-ee19c7505976/convert_audio_track_to_midi_ableton.pdfIn 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.

FilenameKindSourceSize
font_00_sfnt_off00013f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6F 5632 bytes
SHA-256: f17719f068a6991753315253b251dda64b47bbcb480adf911fba992a55d29335
font_01_sfnt_off00015289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15289 12764 bytes
SHA-256: 26685b942a7d573a4aa79511f0947887f7a6d371eb61dc587c0d63fb27a8a131

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