Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad16abeeba9a707…

MALICIOUS

PDF

60.0 KB Created: 2020-12-04 21:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d58d26a593f758124d2a995ebb784603 SHA-1: d03bb95a7bf2b2a992fdd1d93f56127f69837c28 SHA-256: 8ad16abeeba9a70735d1415957b931d2df63cb07b07181bffe853104f647632f
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a large number of external links, suggesting a link farm or phishing attempt. The ML classifier and ClamAV also flagged this as malicious. While no scripts were extracted, the presence of numerous external URLs, including one pointing to 'trafftec.ru', indicates a likely attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafftec.ru/aws?utm_term=cheer+up+charlie+sheet+music+pdf PDF link annotation
    • https://sukevimekixav.weebly.com/uploads/1/3/4/5/134599702/zumetukosot-zarowexew-xuberasox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f8b17179bc2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404750/normal_5fc74b145c29c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452377/normal_5fc5aef04f507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5f8bce6604d50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5f96a56bdd04a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f9a4b776e0bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448129/normal_5fbee9ae7a38b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462736/normal_5fae9affbd127.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/74d4ecc9-1127-4625-b135-5a5c3fed48fb/the_norton_anthology_of_theory_and_criticism_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4ec90ce-38b4-4867-b64e-4d4052afd073/wine_bible_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54015fde-5a3a-4e73-ac5e-0bc3e41f524d/fitadetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a81692-959a-4e20-ab95-e56c2b7e5550/9_regiones_del_cuerpo_humano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e80f63a-edda-4823-b859-99914644312a/calendar_template_2019_2020_printable_free.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_off0000adb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADB7 5300 bytes
SHA-256: 3f46bd640da555818e798a16da816c83b2c75b51f25743604d08904295ab0c14
font_01_sfnt_off0000bf88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF88 10132 bytes
SHA-256: 60b17be6513f27ba558f3cda6caeb8bad5db6d82c7e2b98e36dfd19bfc361a7e

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