Malicious PDF — malware analysis report

Static analysis result for SHA-256 1296deac29350a91…

MALICIOUS

PDF

74.9 KB Created: 2020-12-26 21:34:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 023b043b4e0f954f4cbf5de1d96c0121 SHA-1: 755a68eb3144235a7dbd9c4963e8b01f6f62adfa SHA-256: 1296deac29350a918dd4dcc16754b3063063bd64164db995e275ed4a1a7b2bdc
214 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to contain a lure related to 'origami love heart instructions'. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/strik?utm_term=easy+origami+love+heart+instructions In PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/6139733.pdfIn PDF document text
    • https://fekalebewobazo.weebly.com/uploads/1/3/4/6/134668576/3168191.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467005/normal_5fccd5754cd88.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/didowugorokirug/66041576644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1697411e-1bf2-4c53-9c19-388c6131e297/jobusofuvikuxizamejadar.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/92712170279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f72f1d6e-ed44-4dc1-aa45-ca026db7d9c5/30945084237.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/best_formal_dress_online.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/drake_and_josh_smart_girl_full_episode.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_off0000d2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A0 5332 bytes
SHA-256: 1f96bd658775591cd8e83edaf02a6f483c95b4e2ac5d4d45fd5210c299087b0d
font_01_sfnt_off0000e4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AD 10552 bytes
SHA-256: 68cb6c8dac2e3a4e9accf189c23023b048c7166cb4986fb8b678ba17304f9dd6
font_02_sfnt_off000108f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F3 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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