Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3827ac0c5ecbcbe…

MALICIOUS

PDF

77.5 KB Created: 2021-03-14 03:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 42f76d42743e593957a0c5a64adaaaa0 SHA-1: 8136b303751421b304beed5559ab0b586db66676 SHA-256: a3827ac0c5ecbcbe560c579de30e8c22597efc26a224eeda64a6ee20d6a73dde
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://gimoguvi.ru/award?keyword=oxford+advanced+learner+s+dictionary+pdf+book PDF link annotation
    • http://raffle.website/kopijisebururaeldaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394077/normal_5fe1f504d88ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_6021bf278ce1f.pdfIn PDF document text
    • http://whitetwo.space/48304896086a8tr2.pdfIn PDF document text
    • http://twirlini.com/80353589581k0ygw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_5fd0dc7744081.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410222/normal_5fd0394f3bbd1.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/pusixa/international_public_relations_and_advertising.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08b2306-7df0-4514-8e79-08b2e0483612/30054375934.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/portacot_mattress_fitted_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/descargar_mix_de_anthony_santos_me_gusta_esa_vaina.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/bon_voyage_charlie_brown.pdfIn PDF document text
    • http://puzuritutu.rf.gd/33512655744.pdfIn PDF document text
    • http://busapow.rf.gd/pack_n_play_bassinet_mattress_pad.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/1415089288.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/26289237980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bbb734d-d81d-4af0-9460-b78d40a538a9/what_is_considered_a_constitutional_democracy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b875eeb-836e-4f33-823e-46bd9030a92b/lopewofuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b3093a3-e945-40ae-b71f-e4845e3660b7/how_do_i_program_my_charter_remote_to_my_cable_box.pdfIn PDF document text
    • http://pebulibupa.rf.gd/iconosquare_instagram_report.pdfIn PDF document text
    • http://sojizodujibibo.epizy.com/46766325045.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/zunibanidosisepokumejefu.pdfIn PDF document text
    • http://wosidekole.rf.gd/6308245231.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_off0000ecbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 5608 bytes
SHA-256: 3beb731be23e9ee4875bf17dcf1f0e303ceada5a1080989a4298469fa92422db
font_01_sfnt_off0000ffec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEC 12516 bytes
SHA-256: 894da630c05c883018acfa46621e7a5983913c5b5953073db8ffe7bf7cfbbe82

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