Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eec080894bcfcb8…

MALICIOUS

PDF

88.8 KB Created: 2021-02-12 15:07:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 71faa6f6216a90860ca76e721c70fdcf SHA-1: 9c3d8e404d220b24f325123ba7831e9e85f7566b SHA-256: 9eec080894bcfcb813dc41d772fd7506fb194c8901e357102322b44eb9ede289
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 0.9995

Heuristics 6

  • 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 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://maypoin.ru/wix?keyword=neurips+2020+deadline PDF link annotation
    • https://zewadozodatigi.weebly.com/uploads/1/3/4/3/134337643/zewegib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5fe673716ef54.pdfIn PDF document text
    • https://bawovaleza.weebly.com/uploads/1/3/2/6/132683088/dd4a534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408333/normal_6019730a6f3a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414357/normal_5fee380856cc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366308/normal_5ff1c199b40ce.pdfIn PDF document text
    • https://cdn.sqhk.co/lazuxorus/kqAhdOp/37106542421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487665/normal_601905c1407e7.pdfIn PDF document text
    • https://wilivaja.weebly.com/uploads/1/3/2/6/132682565/a09fd.pdfIn PDF document text
    • http://salonvarna.com/295991744917bhn4.pdfIn PDF document text
    • https://najovukuno.weebly.com/uploads/1/3/1/4/131453374/4416185.pdfIn PDF document text
    • http://choosemadam.site/a_level_english_literature_book1fgro.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/pYicHhT/nozuzutotun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494648/normal_5ffaea0bdabea.pdfIn PDF document text
    • https://jitaginedisa.weebly.com/uploads/1/3/4/3/134324559/petokabut.pdfIn PDF document text
    • http://excellent-spb.ru/76531208571xqw79.pdfIn PDF document text
    • https://totuseki.weebly.com/uploads/1/3/5/3/135322554/rimomira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464052/normal_5fda2f8bd38a9.pdfIn PDF document text
    • http://flowerport.shop/cheat_engine_6._1_free_windows_10fue8m.pdfIn PDF document text
    • https://jewakazakiven.weebly.com/uploads/1/3/1/4/131437085/e455314999b7.pdfIn PDF document text
    • https://nobujudiwid.weebly.com/uploads/1/3/1/4/131452838/laruderofof_zunupona_bekase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE9 4212 bytes
SHA-256: 8ef8397de177241c43130fca4e39e06b1c0cf1a679f83403e1e360a32ec0a91a
font_01_sfnt_off00011dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBE 5196 bytes
SHA-256: 81dc9205182d9339f1e174e3470c312885e9d256e7b98341aa9752980f4a436e
font_02_sfnt_off00012f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F78 11040 bytes
SHA-256: 0f35eb99196c314726000c3aaa3dbf046575da6e9ad72647022099cc602f3115

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