Malicious PDF — malware analysis report

Static analysis result for SHA-256 a51db1027440e539…

MALICIOUS

PDF

349.8 KB Created: 2021-03-16 21:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8eddd0a186622fee710474981af65008 SHA-1: 74ffbed6617a6947d8191dcfb84c872936bd1755 SHA-256: a51db1027440e539b3ea72dc4a300a0573c59e39e877f4cad5d9d433ae3f105a
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 0.9583

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://bologen.ru/123?utm_term=axa+belgium+annual+report+2017 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454040/normal_603290a6c7795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_6047a6aea15f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386334/normal_5fe906e571e34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494893/normal_6039998b92518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417049/normal_6047a9c7ba68d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411493/normal_600dfea51e75f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381738/normal_5ffcbc2eea956.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417312/normal_5ffcb840c8b0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/867f5152-95dd-43d5-b968-4864252648bb/69626632000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a11a487-0d50-4461-beb6-cc483c62953c/yongnuo_flash_yn_560_iii_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/705679fa-d011-4e50-a6a3-64b0edc1c92d/3130579289.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/employee_file_checklist_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/5691010226.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_e5c9c07d201448b0b16653ecc1781350.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c85a78-e86b-4bdf-8f0d-3de346c4a7ef/bob_revolution_pro_vs_flex_duallie.pdfIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_2b85985e45c04c3f8f06846f4ac502d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/blanking_out_text_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60468230-91d2-42db-9916-43696dd144dc/5344909507.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/barbie_makeup_games_free_pc.pdfIn PDF document text
    • https://39472683-7d43-4bc3-882b-0947a83fd973.filesusr.com/ugd/544c7e_f3e98ddfec604f45b95f4e81355af1ae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59749454-88c7-467b-9379-c5c18f105e03/obd_code_p0442_impala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b263158-195a-487c-b5a3-641882e0b3a5/23719177166.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004fc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC32 5564 bytes
SHA-256: 07a92064a1450adb316d923d0e80e6371344780385e0fe33f1a535172631807c
font_01_sfnt_off00050f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50F15 7644 bytes
SHA-256: 510391ca8217d4fe375aeeb1060470f5c4203d87bf8e0665381ba83314ea7296
font_02_sfnt_off000523ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x523BA 14800 bytes
SHA-256: 257f9618d11b1d2301b8118778b1a7e6b249afcc30c6b0032827210ab70288bd
font_03_sfnt_off0005538d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5538D 16136 bytes
SHA-256: 836ab3fafa1d23e35e14e192ec86be8fe8e931eee4b8c79d5c7bf23088570f18

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