Malicious PDF — malware analysis report

Static analysis result for SHA-256 baac0c473ad74f9b…

MALICIOUS

PDF

68.0 KB Created: 2020-12-17 17:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bf8562caaa7b1b48c293353c3083394d SHA-1: 0e82f93e1b6bc048d001468ea11fbdb9a9ef9c14 SHA-256: baac0c473ad74f9b40896be4757b1a534993cfb9e890fc477f4202bcad27d1e2
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to redirect the user to a harmful site, likely for credential harvesting or further payload delivery.

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/123?utm_term=4.7+we+all+scream+for+ice+cream+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5fd60092078dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5f8fd64dd5397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5fbb05529f625.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367905/normal_5fcf5baf89108.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404725/normal_5fcdad8edb69b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f9e62f6e58f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc77bf45c272238a81a68c4/t/5fcaaaf21694195faaa723cf/1607117555619/62037479799.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce1b29cd8500165ad4a92d/t/5fd7070f154d727871031292/1607927568035/40658471744.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18de7affbf90a66ef1cd7/t/5fcf4b52505b451de189edc4/1607420755692/kitekegineli.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b1f5bdb33045eee2efc6/t/5fc9d97c85627875175cd786/1607063939676/mebipesorudogiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c986760e-505c-423f-914c-e3a961954761/interdynamics_mac-134_ez_chill_refrigerant.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5108d5e8e827d42a8a9a7/t/5fcdbaaafe657040d5b0e4fe/1607318188513/46790125275.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56f2f7848ba205d3738c7/t/5fceff5a64290b1c3dcd35e1/1607401307646/chicken_manure_versus_cow_manure.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_off0000cadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADF 5392 bytes
SHA-256: 4e9cc190976573493db3af9cd0a9d72a44f8d84df526820a71544ec8899510e5
font_01_sfnt_off0000dd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4C 11124 bytes
SHA-256: 9fe9ee40f1a56ad614290fdbec1ccedc79dff3d6d05ff020349676144b29912d

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