Malicious PDF — malware analysis report

Static analysis result for SHA-256 a723e654d48c6f00…

MALICIOUS

PDF

76.5 KB Created: 2021-03-18 07:00:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0f7e8bc2d9a9221761efdb0a3b2b39d4 SHA-1: 43cf7cf2b8d8561dd1951d4d9887834a7850ede9 SHA-256: a723e654d48c6f006d9c4e88e8304fda0d081ec0b387e6e59039ea823f42c117
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware download site. The document body, though heavily obfuscated, suggests a lure related to 'space' and 'pdf' content.

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://xezojetit.ru/award?keyword=all+about+space+october+2020+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489722/normal_5ff2ae79339bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_601fb9b05ddfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421199/normal_5fff6113ed2bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_602a71bbf11a8.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/7hjfgjc/zizadizarimifizisim.pdfIn PDF document text
    • http://my-credit.info/nogotuwusidiwezilezutotof34f7h.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/surah_yunus_tafseer_in_urdushk0m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408871/normal_5ff9ea2e9fa9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_603b8c55da5c6.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/hcigo34/live_tv_streaming_apps_for_fire_stick.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450139/normal_5fe92e6b49f28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459322/normal_601d74c32b151.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/1371a25c-42be-4faa-bf31-bb545f17b4f2/woruxisapopewanisuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eef35bf-dadd-4b6f-a66d-baf791f6121d/how_long_is_pretty_little_liars_on_bbc_iplayer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df5ddbfb-6db7-4fef-913c-1989398ea694/warm_bodies_trailer_reaction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bee0180b-492c-40f4-90aa-3cb62b5dde12/mid_level_management_job_titles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54fd76bc-a972-42a5-be76-495706349acc/54093971440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87256174-318d-4dd5-ac8a-7d10754f7f20/pavokobezixekazorexavos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b8176e1-bcb1-4558-a055-0138bbf0cb94/puvos.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_off0000ec17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 5552 bytes
SHA-256: 0e606c867b2ee337f01c9d4b252b6147d5673b0c37eb65154b46b5bc4ec4452c
font_01_sfnt_off0000ff04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 11284 bytes
SHA-256: 0483cc50fbf33252d26fa93b386781888bc50e155b253f0c32793a92a1e66366

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