Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d899ceab92e2de…

MALICIOUS

PDF

63.0 KB Created: 2020-11-11 05:06:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d5b3d035a2abcc5ab5663b992197c523 SHA-1: b8d49487494d7212c63137ebf6107ea706056372 SHA-256: 69d899ceab92e2de61fdfa3e18c2d16fc02afeafcfe24a69e68b8d28433f09af
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 large number of external links, many pointing to suspicious domains, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt, likely leveraging a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?keyword=american+pageant+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f89d52c7b9eb.pdfIn PDF document text
    • https://rasiporimi.weebly.com/uploads/1/3/4/6/134614798/fujog.pdfIn PDF document text
    • https://zinivopupo.weebly.com/uploads/1/3/4/3/134386920/8726227.pdfIn PDF document text
    • https://gitexerepasali.weebly.com/uploads/1/3/4/5/134577484/mizovapukuxa-zawaxedesamuj-vawul-sifamoji.pdfIn PDF document text
    • https://jemajodelevo.weebly.com/uploads/1/3/4/3/134394711/zudakapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5f95b32ca1549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409103/normal_5fa144b1bc6ee.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/rubidokezive/traditional_literacy_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/pamodubo.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/romoridejefexovixajav.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/83902845383.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/lifeline_free_state.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/solicitud_de_amonestacion.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/aacn_nti_2020_location.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/23045631089.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_off0000ba47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA47 5380 bytes
SHA-256: 811e4b8072252ed3c5c09eeaf3c396cd2f30532e6796e9e32c3daeec187c62ab
font_01_sfnt_off0000cc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8F 10228 bytes
SHA-256: ad42d27923dea967b866f8b1516d70a750bf0fab35afda6ddb7896b053167a05

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