Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b880e6ef5d44949…

MALICIOUS

PDF

89.7 KB Created: 2021-04-04 00:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9adb62cfee1692acffca65aafd432bcd SHA-1: b315c85953effb871a1b12528ce2bfa63f50597e SHA-256: 8b880e6ef5d44949e6dd3261be5f0bee3ac5573d51d0a09450c27792d8fdf11b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/award?keyword=faa+far+part+121+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365551/normal_6022e59a4e94e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405895/normal_600414baea9ad.pdfIn PDF document text
    • http://vozivovog.scienceontheweb.net/nonotos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454556/normal_60365a4ab80f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7617ebf-b4ed-42c7-a7aa-f508ef173e26/justin_guitar_beginner_songbook_song_list.pdfIn PDF document text
    • http://laxolagodofomug.onlinewebshop.net/debofenupike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a785a7f4-d5d1-476e-89bc-cd15805bca04/bojolexijebofoguduv.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/vw_vcds_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c7f3a2-a04e-4b5b-bb7f-14536c7235a0/plan_y_programas_2011_quinto_grado_matematicas.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/un_tranva_llamado_deseo_pelcula_completa_ver_online.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/40666778936.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/uganda_immigration_passport_application_forms.pdfIn PDF document text
    • http://jelomasulavi.atwebpages.com/tripura_pin_code_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1deeedec-baa3-4ffd-9e20-0fe589b0d1f3/26858961061.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/96714345821.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/mossberg_930_hunting_camo.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/rurekunadepiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed56085-a9f5-4eb2-b9ea-4732af0852d6/xeluresawiponulilolopigor.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_off00012072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12072 4964 bytes
SHA-256: 9ac54910fa7b21f52eba5339482a6bbdccee1d930cfbeaa42e56c9497aca2eac
font_01_sfnt_off00013172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13172 11408 bytes
SHA-256: 6d89c3cc3d40efc7b65f8f3ee54f34fef42d347c7117d231ca0426b4b654c292

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