Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b7a83d73eab2d6…

MALICIOUS

PDF

71.6 KB Created: 2020-12-23 09:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 59885c2fae950886dfbe1a859f17d3ce SHA-1: 0fc0fb1b37e5fd5997bddeee03afc61f30f4bda6 SHA-256: 32b7a83d73eab2d6c7187da85a971929ee7627e1781f0db1733ce443611c65b3
126 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 as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic analysis revealed it functions as a link farm, embedding numerous external URIs across various disposable domains, suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the presence of embedded URIs and the PDF nature of the file suggest potential exploitation of PDF vulnerabilities or social engineering to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/aws?utm_term=careless+whisper+clarinet+pdf PDF link annotation
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/2e0cd77e6.pdfIn PDF document text
    • https://mewotevavaxaviz.weebly.com/uploads/1/3/1/0/131070751/muwomojax-motasijis-sozutokexujokix.pdfIn PDF document text
    • https://rerigasudete.weebly.com/uploads/1/3/4/4/134498455/fumokaliwojame.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/6cfa1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5fad8544bc9e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_5fa9e91b30240.pdfIn PDF document text
    • https://notebatamigoxaw.weebly.com/uploads/1/3/4/7/134715817/4748212.pdfIn PDF document text
    • https://bonujuvab.weebly.com/uploads/1/3/2/7/132740321/voxotu.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/bidugevo-funolazowalus-powinuv.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/davubewu/current_members_of_metallica_band.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/21242958679.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC34E 5240 bytes
SHA-256: 8c4f23fff63a6f16c62d9b3afcdc98b6f9be059be9d16895da03ef1bd759e28d
font_01_sfnt_off0000d52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52C 12628 bytes
SHA-256: 04e538ff230e4313d4748d9b61d0373adf4e792bee4265398cc65a18b1cbad17
font_02_sfnt_off0000fcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC6 16120 bytes
SHA-256: 15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208

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