Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9cd098d56661dc…

MALICIOUS

PDF

84.2 KB Created: 2021-05-20 04:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 36e22b8e71b69b9d8f867198b9d4b4f3 SHA-1: d114498fb86f199ab4ee74c3fe2b9f17596a2f23 SHA-256: 9a9cd098d56661dcfab888eb1858eb121f1424fc6ef8a745f13b2ca5e96ae12b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. While no scripts were directly extracted, the PDF structure and embedded URI suggest a phishing or malware delivery attempt.

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://botokaw.ru/strik?utm_term=french+horn+warm+up+exercises+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369161/normal_5ffadf0504a30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5fe8b3c4b7430.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449616/normal_5fc7d24d17cee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384831/normal_606e9f8eccb86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468531/normal_605d873b6d44d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_60262e6594db8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_606245ff1c107.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459029/normal_5ff9257e020ee.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/657bce80-3bdb-40fe-9967-e862a698b3d8/ldg_kt-100_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f4ca2c-54f5-4a54-b242-72f5217b4d40/37189982690.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/poruvope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0352bf3-a551-452c-9437-2e09306f3c14/samsung_galaxy_s9_case_ebay_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f1c7f4-a4b6-43cb-82e3-67d73694e4d0/wr30m_watch_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ef0334-39b4-46ab-8986-612828e39b5f/78912962658.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/lorraine_lea_linen_sheet_sets.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/peripheral_arteriovenous_malformation_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/font_blippo_black_rounded.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/arthrex_prp.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/stable_angina_guidelines_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/medieval_german_clothing.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF618 5476 bytes
SHA-256: 7955ec03eb3110fbd7a1cf7024fa587b6a898e76553ecd7405a51c20771ab605
font_01_sfnt_off000108a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A7 10936 bytes
SHA-256: 0e0007bfd320a565a8442d46b4556c56e78b5ff9a43a2874c038da55d1d58ecf
font_02_sfnt_off00012e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E48 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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