Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6fdf55a61b395a…

MALICIOUS

PDF

82.3 KB Created: 2021-02-21 20:37:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c9ebc4b09221b06087b28f8444f2ec3e SHA-1: 60a3af06927b6ceb530539e3e01f3d563d1ac28b SHA-256: 9e6fdf55a61b395ad90d5bf15dce3879374605f7429e3aed518432eb9d404cb8
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://druttle.ru/aws?utm_term=como+puedo+ser+un+lider+en+mi+trabajo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5fd8f97d7f3e1.pdfIn PDF document text
    • https://letavozogat.weebly.com/uploads/1/3/5/9/135978758/saxofirupefud_kurekeg_kapidisaruw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405662/normal_5fc6cbb0bcf8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413120/normal_5fda341b10bed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378607/normal_6009b4a803f34.pdfIn PDF document text
    • http://ig-copyrightviolation.com/nebujipuzivsw2ty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496597/normal_602f7af463f08.pdfIn PDF document text
    • https://zaxewunatomilar.weebly.com/uploads/1/3/4/1/134131499/9a20783d6c36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482413/normal_60203e8977a9f.pdfIn PDF document text
    • http://top-shop-store.website/task_list_excel_template_free_downloadsnhoo.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/2017345.pdfIn PDF document text
    • https://duzunadi.weebly.com/uploads/1/3/0/9/130969775/josake-wolatuvo.pdfIn PDF document text
    • https://damujulul.weebly.com/uploads/1/3/5/3/135335913/pimolu-semezal-dobawot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455375/normal_5fca708a5aea6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382003/normal_5fc6b98ca420d.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/wixamupelinere/zudadenoseza.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/melewubuviziliwulaponixip.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/calculus_1_2_3_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/sajoj.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/45466652247.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_off000101d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D3 5228 bytes
SHA-256: 888a92ff9c896ba4533498e57d14007d1759b160daf2b7f9e731cb46a7133128
font_01_sfnt_off00011374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11374 11904 bytes
SHA-256: a9a8831967b3675256068292ff79e380d6f0feea5d57028917f4606fd36c925e

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