Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f06cbb060f751c9…

MALICIOUS

PDF

90.9 KB Created: 2020-12-03 11:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 963d51e389ed76e561490e415ea61b42 SHA-1: d79c099d5812a47204aacf9041f42372141c7dcc SHA-256: 0f06cbb060f751c9b3dd8338a55a1d2d1112e00bc8a8828a44690b5c2e26cb7c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=weigh+tronix+wi-110 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478383/normal_5fae108208ee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383138/normal_5f9e614ee3e39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418755/normal_5fb3eff6643ad.pdfIn PDF document text
    • https://fudawaso.weebly.com/uploads/1/3/4/3/134317256/nepofatoda-somalaxi-nazopejo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84e66cf-664a-4054-a463-1d578cff258b/94019426522.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/22236831510.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/placa_ateroma.pdfIn PDF document text
    • https://s3.amazonaws.com/muvunekagok/35267621890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7462f2-c0d0-46ef-b30e-05d614647038/60281525614.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2af36df132613bbc92a03/t/5fc4f776f81c9a2a0c3e4dc8/1606743928555/is_channel_divinity_a_bonus_action.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a53b646-3308-499f-9740-a775ccfdbc3b/fortnite_season_9_teaser_twitter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9307643-2f0e-47bc-a744-c6bf2558698b/98167275569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a1fd2a-c59e-4a20-8aad-ae890744e0f0/sovipe.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_off00012111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12111 4928 bytes
SHA-256: d9913f5e2e80cbafa7f33fc3c7d46bb87a0c979519787516df39ab3dfbdd4395
font_01_sfnt_off000131ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FF 13228 bytes
SHA-256: da3cb97b6670bcecda1b04f81a064a2cca0df285bd94753e3bd42f9901dcbbee

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