Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b30d3791d43048…

MALICIOUS

PDF

67.5 KB Created: 2020-11-17 08:27:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b14d15815de3835d21cfda46920e1186 SHA-1: b11897d96c4aa1fc49bedbee89e5492c171143c0 SHA-256: 63b30d3791d430487a5671433a2a590fa606176c1cb14028f265346556136d2f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical finding for a PDF link farm and a high ML score, indicating malicious intent. The presence of external URIs, specifically the link farm pointing to various PDF files, suggests an attempt to redirect users to potentially malicious content or phishing sites. The ClamAV detection further solidifies its malicious nature, classifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=she+comes+first+pdf+online PDF link annotation
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/dixizudegojodubexam.pdfIn PDF document text
    • https://vatewiwep.weebly.com/uploads/1/3/4/4/134482367/seletopezaba-soneluga-zikijepemixo-gobimoviwumefoz.pdfIn PDF document text
    • https://sajenaviwabawi.weebly.com/uploads/1/3/4/2/134266368/zegadujipulin.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/kavitokolezub/11557671288.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/3250963124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e4f1d4f-7100-4efd-ae95-529c2ceaf0d0/12658919696.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/classroom_objects_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3bfafd3-7e87-43c4-8d42-5b4a5bd2de3c/elite_dangerous_combat_tips.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/usf_spring_2020_graduation_dates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba06bcde-92ae-4203-8da8-0521a867f9b5/92378465721.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/p_control_chart_template_excel.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA71 5288 bytes
SHA-256: 2e7bf7c3aaa19be0298c1d43929dcb3bb1fa13daf5abfab20ac75f7b6291c780
font_01_sfnt_off0000dc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4A 11036 bytes
SHA-256: e94c5618e34bcb42e5eb1e52e1385f1cf7d629f266a09be485e3484c3c20ad6f

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