Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7723a7fd777696…

MALICIOUS

PDF

79.2 KB Created: 2020-12-07 15:06:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 04088f833f233973382ca237bf5f7bfd SHA-1: 91d3d5bd629f59a58786cddfb75b8a753cafd584 SHA-256: 8b7723a7fd777696eba5d7096ca3a83b312c967e220b9dd8e7c1d51edc2b20b6
96 Risk Score

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 0.9997

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://trafficel.ru/123?utm_term=intensity+of+the+sound+waves+calculator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473415/normal_5fb776ade95d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f93f67eb35d3.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/bda4bc5d-e7dd-49b1-9e29-7af4e08d1bc1/chapter_4_folk_and_popular_culture_key_issue_3_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9eb3398ff75152e2002/t/5fc138c53485235c86f3566e/1606498502146/57248812470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d97cdf1f-bbbf-4e0f-8888-6c9a67b4d110/fairhope_pirates_apparel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b4116d-e646-4270-af18-0d567c779f34/12559952743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800b2da5-f5c0-4eba-abce-fce6edcebd67/31641461188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e395b1-5ae9-4992-b5e9-4559f3a1e5e4/gagijasuvawoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf4594b-945f-4743-b877-f4c8caa9d8fa/zugidaposefadumuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bfecf2-bd0c-437c-bb55-ecaaeb6c7ba8/88418564383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72fc8842-8505-4600-a8bf-379f2ab00bd1/nakob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf79360-a87f-4ba5-9b16-5f80a8abde44/indian_style_sitting_bad_for_you.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_off0000f60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60F 5300 bytes
SHA-256: 4bc789256182b461531d6d5b4a1869a533ede34eaec9966009ad39db1c785ef3
font_01_sfnt_off0001082b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082B 11832 bytes
SHA-256: bf5ce9e54c7f2bd0e43ccb8c3a71451c69ad67df75eea20aeae98ce58e41f087