Malicious PDF — malware analysis report

Static analysis result for SHA-256 985d5769271062c5…

MALICIOUS

PDF

33.2 KB Created: 2020-06-04 04:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: b97547ee600912beed34683f39a7ab9f SHA-1: c2c16c5e0151d98ee0a263a0d8d476b25c51dba6 SHA-256: 985d5769271062c5558db6f0e2df46ebc9488a947db960c6b2c6fd48e9a48bbb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are also present in the extracted URL list, suggesting a coordinated effort to drive traffic to these sites. No scripts were extracted, limiting the analysis of direct payload delivery.

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://centralvirginiacbd.net/uploads/1/3/0/6/130605472/130605472.html#possessive+nouns+3rd+grade PDF link annotation
    • http://xtremejoinery.com/uploads/1/3/0/5/130589114/sogogojisawovuwizaku.pdfIn PDF document text
    • http://creative-tech.ca/uploads/1/3/0/5/130590164/326db45aea0.pdfIn PDF document text
    • http://tourforthecure.ca/uploads/1/3/0/4/130483050/1a249.pdfIn PDF document text
    • http://ahanihayk.com/uploads/1/3/0/5/130547884/bikuja.pdfIn PDF document text
    • http://heartlandjoy.com/uploads/1/3/1/8/131856068/bojomidunexomejudero.pdfIn PDF document text
    • http://mail.jaredhammer.com/uploads/1/3/0/5/130551864/wasenusamolepe.pdfIn PDF document text
    • http://craigodesign.com/uploads/1/3/0/7/130775760/eacce3.pdfIn PDF document text
    • http://mail.realityism.com/uploads/1/3/1/0/131070559/fizuw_ravukebidufore_dufosun_vaxirutizizep.pdfIn PDF document text
    • http://onlinefinancieeldossier.nl/uploads/1/3/0/2/130287482/17b70428b3641.pdfIn PDF document text
    • http://centralvirginiacbd.net/uploads/1/3/0/6/130605472/terms.htmlIn PDF document text
    • http://centralvirginiacbd.net/uploads/1/3/0/6/130605472/dmca.htmlIn PDF document text
    • http://centralvirginiacbd.net/uploads/1/3/0/6/130605472/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sozibibuji.files.wordpress.com/2020/06/42969487645.pdfIn PDF document text
    • https://vubagojexub.files.wordpress.com/2020/06/kofivorokixesotuteda.pdfIn PDF document text
    • https://zowolov.files.wordpress.com/2020/06/79946133930.pdfIn PDF document text
    • https://pufikono.files.wordpress.com/2020/06/47681202737.pdfIn PDF document text
    • https://febavimoju.files.wordpress.com/2020/06/87212406003.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56DD 10028 bytes
SHA-256: 4fc5bb55632c18dc72863250402ce3c75d624550b2531808eccc91708e4bcb28

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