Malicious PDF — malware analysis report

Static analysis result for SHA-256 577d82c9e61465a1…

MALICIOUS

PDF

81.7 KB Created: 2021-05-24 13:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5263fa2d950b6c584037a80145b62925 SHA-1: ae52b5826ca0937f2825c278f6b2a103c1d82cf0 SHA-256: 577d82c9e61465a13d53c972aec723837755ffee2f03202b4ee6d3bcf05850fa
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to contain metadata related to its creation, suggesting it was generated programmatically to serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=three+branches+of+government+lesson+plan+4th+grade PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373985/normal_60246fcae0fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_601627d5e917c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452199/normal_5fdf2c9d35dba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8897f6b5-a518-4e31-bda0-7527ffe8e8bb/red_rising_movie_or_tv_show.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b311c34-12de-413a-a3d0-126ac5bb3f06/15117941770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/575cf05d-42cb-4f5c-805c-be5c0ca73d2f/ponibomuleboxez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50fd00d6-ecad-48ac-90a1-7312c1498db8/kifanideleput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2ed1b3-a5de-4b00-80b6-12c6e454d429/masterbuilt_electric_smoker_cover_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/71372481384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d3472af-dcfe-451d-aafd-3332f0aec220/68280747238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf50eb6-7955-4097-8705-da77a20b74e0/fokijonosilijuwalodadanex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/153c856d-e9ca-498f-bc38-429cb37c7bbf/washington_state_unemployment_phone_number_customer_service.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/saroxumorinowegazovadusaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800926a0-452c-41b5-8fc0-c6849096d3a5/whats_another_word_for_non-aggressive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c0d5ea-9ffc-45f7-bf2b-6ca78701c030/kitakirofirizemuzelul.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/batch_convert_html_to_online.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/android_studio_toolbar_shadow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f9039a-9c02-485c-b09b-bed21390867d/el_mundo_de_sofia_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/how_to_sync_ipega_controller_with_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/lomokonububuzado.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF513 5544 bytes
SHA-256: cc4c5d0bbcda3fd83b55027efd7eae435072b8a1489855836b9abc75581d16b0
font_01_sfnt_off000107bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BF 10296 bytes
SHA-256: 6c4b6c4288484915e624ab4da220ae8a67e6b3dc96fa1e0cc277ed2467d8078b
font_02_sfnt_off00012aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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