Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce7e4cd5aa86309…

MALICIOUS

PDF

72.9 KB Created: 2021-02-14 22:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0c208f915ff73c4fda85ce5db5d636e3 SHA-1: bdc32018859500f7389acc0c8a6278b6e808e7ef SHA-256: bce7e4cd5aa86309970c93117280066acad4340c33de7926d02d863995024c4e
96 Risk Score

Malware Insights

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

The file is a PDF that contains embedded URLs, one of which is directly referenced in the document's metadata and appears to be a lure for a crossword puzzle answer key. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of external URLs and the nature of the PDF content suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=crossword+puzzle+the+scientific+revolution+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419415/normal_6024f1091177e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504568/normal_6008bcfa4e4c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495387/normal_5fedd3ae05b4f.pdfIn PDF document text
    • http://damvglaz1.xyz/gupejefunefijemedidakiv7exjl.pdfIn PDF document text
    • https://cdn.sqhk.co/suxepemup/fFtSTkr/shogun_restaurant_menu_seaford_de.pdfIn PDF document text
    • http://cosmostil.top/predicting_molecular_geometry_and_hybridization_answerswxwd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5fe728cd2d842.pdfIn PDF document text
    • http://pokupka.space/30416351479n8276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_6018d7889e80f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447878/normal_5fdb74318dba7.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/9Pn4iQE/58437856517.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_5fdd6255aabb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451752/normal_5fc8710800939.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/papuja/cliff_empire_guide_deutsch.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_off0000e07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07B 5516 bytes
SHA-256: 3be20dfe0caa434d4f658747e87439e2810f761d4222a1c321bc1ca22a6496f6
font_01_sfnt_off0000f35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35D 10160 bytes
SHA-256: 00ead24aa8dfa8f98a88b854b60a441d1a02e38ebd279fbb01cf6358c5671c5d