Malicious PDF — malware analysis report

Static analysis result for SHA-256 019d87d11ff73d0e…

MALICIOUS

PDF

70.7 KB Created: 2021-02-20 14:17:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0065d1cb8a59ed9c2cc945a1bd1f58a0 SHA-1: 5a7b0740103f4016513f9ae3ea4749739938984a SHA-256: 019d87d11ff73d0e5cab92916ca92cae0303c66e912d9813ef485de3f3fbe8de
186 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 6

  • 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.
  • 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://baarspo.ru/wix?keyword=qualities+of+a+good+student+council+treasurer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500438/normal_5fd084ea19b20.pdfIn PDF document text
    • https://vozozexofevufut.weebly.com/uploads/1/3/1/8/131871902/8970602.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402717/normal_5fee99592869a.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/hfgfgcK/88614042797.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/ogchbeV/voice_recorder_audio_recorder_sound_recorder.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/blvghPc/26449521496.pdfIn PDF document text
    • https://bezamefiparafu.weebly.com/uploads/1/3/4/6/134665790/binixawefaj.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/jfunkja/descargar_mobizen_mirroring_for_samsung.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404730/normal_5ff69b14a260a.pdfIn PDF document text
    • https://gulikefesagigal.weebly.com/uploads/1/3/5/3/135303577/4226367.pdfIn PDF document text
    • https://megevoweroke.weebly.com/uploads/1/3/5/3/135351245/6344901.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380395/normal_5ff1831822600.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/thfO594/78193391258.pdfIn PDF document text
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/mawesudu.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/xojafemori/17122881914.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/19105146763.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/fundamentals_of_financial_accounting_edmonds.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/55890164581.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_off0000d9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A8 5252 bytes
SHA-256: 8600d25d35217e2fb6c514c38d3e86b56b5b2a0b65dff512772dec1ba66657cd
font_01_sfnt_off0000eb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB90 9972 bytes
SHA-256: 10738f69c464bafb77d3c6b2eb70da71dc0db69d39aa605ae3d5a200886a6903

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