Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3679e81c5c5706…

MALICIOUS

PDF

37.7 KB Created: 2020-06-04 23:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 57a374dcc206c47ca1ef90d3a7827f7b SHA-1: c2acfa499a900f87573a91c04c11323e555f445e SHA-256: 6a3679e81c5c5706df23f818f171c712e5fad335b8e4a1ca983fd108056706c2
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains references to a driver's manual and URLs that are likely used to host malicious content or redirect users to phishing sites. The ML classifier strongly indicated maliciousness, supporting the attack pattern.

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://faithgoenner.com/uploads/1/3/0/7/130775186/130775186.html#georgia+driver%2527+s+manual+2016 PDF link annotation
    • http://mta-sts.mx.glowfishstudios.com/uploads/1/3/0/9/130969406/11a492d.pdfIn PDF document text
    • http://mx.saintjameslakecity.org/uploads/1/3/0/6/130639755/0e68d9e1.pdfIn PDF document text
    • http://rossanaporta.org/uploads/1/3/0/2/130271113/digobuwak.pdfIn PDF document text
    • http://cpanel.kansaspoets.com/uploads/1/3/0/6/130604694/wekalubu.pdfIn PDF document text
    • http://lionessera.com/uploads/1/3/1/3/131382126/f7dfe11e85.pdfIn PDF document text
    • http://tngan.com/uploads/1/3/0/2/130287454/6273051.pdfIn PDF document text
    • http://christiancloutier.net/uploads/1/3/0/4/130476850/8477173.pdfIn PDF document text
    • http://74-123-73-65.mgwnet.com/uploads/1/3/1/6/131606467/korodum.pdfIn PDF document text
    • http://normantownchristian.com/uploads/1/3/0/4/130476853/f5670c8a267b96.pdfIn PDF document text
    • http://giannidamaia.com/uploads/1/3/0/4/130488251/2e928.pdfIn PDF document text
    • http://kchcapital.com/uploads/1/3/0/7/130776103/8093267.pdfIn PDF document text
    • http://mil-dare-rlt33.com/uploads/1/3/0/2/130289746/81058.pdfIn PDF document text
    • http://dsjnlee.com/uploads/1/3/1/4/131437724/09b3e5ba669.pdfIn PDF document text
    • http://faithgoenner.com/uploads/1/3/0/7/130775186/terms.htmlIn PDF document text
    • http://faithgoenner.com/uploads/1/3/0/7/130775186/dmca.htmlIn PDF document text
    • http://faithgoenner.com/uploads/1/3/0/7/130775186/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://turoxox.files.wordpress.com/2020/06/9774657122.pdfIn PDF document text
    • https://muwiful.files.wordpress.com/2020/06/58005456553.pdfIn PDF document text
    • https://xilejabugagu.files.wordpress.com/2020/06/gufisobokuvire.pdfIn PDF document text
    • https://jolikakotex.files.wordpress.com/2020/06/fanidaditapovanozup.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 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6897 9940 bytes
SHA-256: 5b7fd560a0a645413d5119d0790516d31b5e62e4ff9bb12e1d5e949fe29835a2

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