Malicious PDF — malware analysis report

Static analysis result for SHA-256 366a9b73553e5140…

MALICIOUS

PDF

38.4 KB Created: 2020-06-27 21:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 5b273bc2972e04df64e6373991c5768b SHA-1: efde6d5670b4797b6f7ac759aa9ee9b5337a2ece SHA-256: 366a9b73553e514019c9ca77e4732b2da5b55ddd42d6b1fc16bb14f6f311ce7e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded external links, a technique often used for SEO spam or to distribute malicious content. The document body, though corrupted, contains references to 'tutorials on iphone 4s' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure to potentially harmful content. The primary attack pattern involves directing users to a vast network of linked PDF files hosted across numerous domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://files.championschoicecamps.com/uploads/1/3/0/6/130639493/130639493.html#tutorials+on+iphone+4s PDF link annotation
    • http://votingforourlives.org/uploads/1/3/1/4/131438499/zusin_nijatezexaluxik_laxaduxawa_jozuvonipa.pdfIn PDF document text
    • http://pipsqueakacademy.com/uploads/1/3/0/6/130620520/zekejogere.pdfIn PDF document text
    • http://mbstraining.club/uploads/1/3/1/3/131398272/3ad3314181421.pdfIn PDF document text
    • http://creativepropertysolutions.org/uploads/1/3/1/3/131381052/rumevo.pdfIn PDF document text
    • http://rowdybartending.com/uploads/1/3/0/8/130814830/zovewafunakejitu.pdfIn PDF document text
    • http://files.laidorecelebrations.com/uploads/1/3/1/4/131437833/genirakabebexam.pdfIn PDF document text
    • http://vickersmilitary.com/uploads/1/3/1/8/131872137/1847242.pdfIn PDF document text
    • http://preferredtowinghenrico.com/uploads/1/3/0/7/130740483/goxas_pofegaxukas_kinaduxur.pdfIn PDF document text
    • http://files.cewl-horses.com/uploads/1/3/0/6/130605315/2726833.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rekujowaba.files.wordpress.com/2020/06/getozejevezupuwaw.pdfIn PDF document text
    • https://neguraxopon.files.wordpress.com/2020/06/35022386676.pdfIn PDF document text
    • https://ririrowibafa.files.wordpress.com/2020/06/viduzimaxetoxotu.pdfIn PDF document text
    • https://pegolupoduw.files.wordpress.com/2020/06/gimukakuwefemuwuvu.pdfIn PDF document text
    • https://wesijirapi.files.wordpress.com/2020/06/20714419451.pdfIn PDF document text
    • https://newelav.files.wordpress.com/2020/06/12106656617.pdfIn PDF document text
    • https://keligorages.files.wordpress.com/2020/06/43262828692.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 2

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_off00005769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5769 4828 bytes
SHA-256: 2a9d6133c1d6c6ab556901b1caeae5499bf057845864d915613ad49d7b5f62bc
font_01_sfnt_off000067be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BE 10856 bytes
SHA-256: 550dde96f19c621ee4f8399fdc4ee795abb743457462bcbf09896ddcc4418a3f

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