Malicious PDF — malware analysis report

Static analysis result for SHA-256 b55bc6e00877b8c5…

MALICIOUS

PDF

69.5 KB Created: 2020-12-01 23:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: def4688ed62cd82f5ffda1a663074952 SHA-1: d82eedd73d95146b2ce9daf704f6f8c1809c1d8b SHA-256: b55bc6e00877b8c5af06ab98a91ecb2d9106870e323c70d77b9e02cf154dbe4b
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://trafficel.ru/strik?utm_term=consent+letter+for+minor PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/96bf094d-533e-4fb8-b9e1-502946691f7f/32587832584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb37f412-b889-4df4-a82b-885940cbfbc9/jawenexokiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e14d470a-ad0e-425b-b305-21654450d458/pecan_prices_in_texas_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34cb833c-c64a-4330-8e82-1fb6152efec0/15823076207.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc32334ea4a794d5653bf07/t/5fc542382dd96f591899fdf2/1606763064659/kuzegipowavivigowazinugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9ecdf29-ce15-4631-b6fe-ead7970cbd39/birinitagagenodofom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae3f057-56a7-4ad4-bc95-08cb2ec77c1a/bttv_emotes_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe2da818e72e5fdba134ef/1606299049298/fotiwifevob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3701d1e-5ab8-4a48-9a70-21ed0799189d/povefisusowube.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfeb102bbd74065800e14d/t/5fc25044eaf37e3b64e7c4f6/1606570053330/92041239544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f978c8-b2dd-498c-be7a-e26b54d16b75/nightcore_music_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/lutebaruwifego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e743c46-f2fc-4b6b-85c1-7ab99a84a508/zivuduwetis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a748886-0220-45f6-8555-0cae6891e737/bhojpuri_gana_dj_2019_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/vage_formuliert_englisch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab7b2fb-599f-4556-bd9a-4b5f9517c909/isfj_strengths_and_weaknesses.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_off0000d652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD652 4608 bytes
SHA-256: 01e56672e8cb1161340b7eecfc366e750cf3c8ad94ca2654e2f2d03fc13da52d
font_01_sfnt_off0000e5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E2 10280 bytes
SHA-256: 2b62f9ddd97812042ee1d8ebe144b96176d1dbb658a7f5f90d2796158a8648a0

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