Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2d33532c6264ee…

MALICIOUS

PDF

81.8 KB Created: 2021-02-22 17:19:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4e8a816152f94b52bdc0cb22c02cc08b SHA-1: af5ab3e7fdd9077b526e6718068c34befb7f6967 SHA-256: 8f2d33532c6264eeae8fa49f1488fc855d324a00cc0a5381b4bc6379b86058cc
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An external URI, 'https://baarspo.ru/wix?keyword=the+olfactory+epithelium+is+lining+the', was found embedded within the document, suggesting a phishing or malware delivery attempt. No scripts were extracted, but the presence of the malicious URL is a strong indicator of an attack.

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://baarspo.ru/wix?keyword=the+olfactory+epithelium+is+lining+the PDF link annotation
    • https://cdn.sqhk.co/niripakexad/erthjjj/zameka.pdfIn PDF document text
    • https://bebibamo.weebly.com/uploads/1/3/1/4/131438385/rudabumadisetat.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/crqe0I2/89096743752.pdfIn PDF document text
    • https://tajezutudod.weebly.com/uploads/1/3/1/3/131398094/nokalixakevimexeva.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/yU4Sggv/27938845614.pdfIn PDF document text
    • https://vomadepuxu.weebly.com/uploads/1/3/4/7/134700608/f1b3b4040733.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/minaxigevani/angular_5_version.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/life_after_death_stories.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/geographical_indications_act_1999.pdfIn PDF document text
    • http://lobaman.epizy.com/assassin_s_creed_rogue_additional_content.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/56796453719.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/82292140357.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/lujuji.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/wewepividipijipala.pdfIn PDF document text
    • http://fuxunefilat.epizy.com/videdikonoxuvija.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_off000103ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CA 5480 bytes
SHA-256: d3184d6f708b4a78359581f96457be4a4dfdb22595a9ce62cb72cb71b6689cf2
font_01_sfnt_off00011651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11651 10456 bytes
SHA-256: 56b2ddb339cd8727645737de7cc929be1dc36863ec47c73c26a1558db1382c97