Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c9e34e39ac61b4…

MALICIOUS

PDF

74.4 KB Created: 2021-01-14 11:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 47e0702ee2684051d963f313a0b8fa2f SHA-1: 26ef932439c2c34629dc570599c83089efa36f1a SHA-256: 19c9e34e39ac61b473b54f2ddb7b2c311fd5fca674c4a4694d76942cecfbb8da
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://ggtraff.ru/aws?utm_term=causes+of+the+american+revolution+pdf`. ClamAV also detected this file as `Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0`. The document body, though heavily obfuscated, appears to be a lure related to a PDF search term, reinforcing the phishing pretext.

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
  • 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.
  • 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/aws?utm_term=causes+of+the+american+revolution+pdf In PDF document text
    • https://site-1166598.mozfiles.com/files/1166598/estreimiento_cronico_funcional.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472783/normal_5fd38941ec8d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414677/normal_5fcf0eae69406.pdfIn PDF document text
    • https://site-1175763.mozfiles.com/files/1175763/42447415544.pdfIn PDF document text
    • https://site-1175001.mozfiles.com/files/1175001/aaj_tak_app_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/ao29haX/zigzag_vs_zigzag_plus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494432/normal_5ff6c54a5b087.pdfIn PDF document text
    • https://site-1244719.mozfiles.com/files/1244719/45936852173.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486548/normal_5fee92fa12023.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383572/normal_5ffcf8e45b30b.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/xefejevife/29144270857.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/49779380952.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/gateways_to_art.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/jenegiluguze.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/golowuzuzoralapuru.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/5654620246.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_off0000e3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A0 5360 bytes
SHA-256: 17a4c69eec586cf464e00295c7480ef336bfc7120f293b354028a5cd584aaba7
font_01_sfnt_off0000f5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B2 11344 bytes
SHA-256: e9f19d5dc41f8625237e6168bf8ee0dda2dbc64c2da80ee175e12dc1461d416c

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