Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30adbe9280381d4…

MALICIOUS

PDF

47.2 KB Created: 2020-11-06 14:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 91bd72a7382aa2dcbbae94ad95ee3e99 SHA-1: 9e0736b2c252c5c70013519df1afe618af91ad0d SHA-256: a30adbe9280381d41ea8049939f55e866304f45108e58732acb75e27ccb9d8bf
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on directing the user to 'https://trafffe.ru/123?keyword=magistrate+court+of+cobb+county+ga'. This URL, combined with the document body's mention of 'magistrate court of cobb county ga', suggests a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafffe.ru/123?keyword=magistrate+court+of+cobb+county+ga PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f894e622bd59.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/gerenin.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/potokoloxat.pdfIn PDF document text
    • https://jajedasas.weebly.com/uploads/1/3/4/2/134234666/4421038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f8d482443462.pdfIn PDF document text
    • https://bumujonawomete.weebly.com/uploads/1/3/4/4/134435367/9268004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f8dd23e6c1a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450890/normal_5fa2398827089.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/kurutiv.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/gotenukevepunin/bharat_ratna_award_winners_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/095ee298-ac63-4d17-ad8f-2956de80cd99/gapurusotej.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_off00007951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7951 5264 bytes
SHA-256: 088092a26995047e61c12f89788648bc7279ec27176d3ffcfcc072482d7d02ca
font_01_sfnt_off00008b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B68 10760 bytes
SHA-256: 7827f41ab1f028eaa9586d327413a5315a6fb99c8fa328d4492a7c84890074ce

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