Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c43cf1e79d27494…

MALICIOUS

PDF

61.6 KB Created: 2020-11-10 00:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3b1a91b4abc1c441ffced8c2284ca0c3 SHA-1: e6fa1a5c5b7520f997dc538873ab3532605ceafd SHA-256: 2c43cf1e79d274947ddd4cd79d02962eff2a88e08250846e2c2b26397674cefd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The presence of multiple external URIs, including one pointing to 'traffking.ru', suggests a malicious intent to redirect users. ClamAV detection and ML classification further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate a likely phishing or malware distribution attempt.

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://traffking.ru/123?keyword=pdf+the+watsons+go+to+birmingham-1963 PDF link annotation
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/1983365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375703/normal_5fa3ea9b2e50f.pdfIn PDF document text
    • https://lesajevix.weebly.com/uploads/1/3/4/3/134318042/cf2e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418385/normal_5f9d5e8a15d5e.pdfIn PDF document text
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/586683387e2.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/aafa95b5.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/kakef/balloon_tower_defense_5_hack_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d09d7c-9531-4f1e-b26f-dd6022304fc3/pijulajozekobubitab.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/university_family_medicine_east_greenwich.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/caballo_de_troya_1_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/89947916557.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/academic_english_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/50158250514.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_off0000b0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A9 6080 bytes
SHA-256: fa64f4837ac86f9877e9471c7961551e18f9c70cc39d5e8f6991c2210a757291
font_01_sfnt_off0000c54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54A 10776 bytes
SHA-256: 4dd82372fc8b7fc15e24a29fa6323a5c2004ed3b4c295c3b1bf035a61afb85bd

Open this report in the interactive analyzer, or submit your own file for analysis.