Malicious PDF — malware analysis report

Static analysis result for SHA-256 63afca6a7828d260…

MALICIOUS

PDF

34.3 KB Created: 2020-05-15 15:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 4c8e397a099f9120400aa398ee9f3a6d SHA-1: a10396dc3cd0245a748403ff0c1d73bfd4cafd1e SHA-256: 63afca6a7828d260b9be50275f705aa4330e67a49d0cba7bb474a6cb857a7a3a
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. The document body contains text related to a worksheet, but the primary malicious activity appears to be the mass redirection to external URLs, likely for SEO spam or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://komercallc.com/uploads/1/3/0/7/130776592/130776592.html#prepositional+phrase+worksheet+ks2 PDF link annotation
    • http://jayvapejuice.com/uploads/1/3/0/2/130288802/tivifesawofiw.pdfIn PDF document text
    • http://uncorkedrunner.com/uploads/1/3/0/5/130551190/fugev.pdfIn PDF document text
    • http://aero-scale.com/uploads/1/3/0/3/130324420/0dc98710991a96.pdfIn PDF document text
    • http://prestomagictricks.com/uploads/1/3/0/4/130478975/kozetagudimew_vutizopejugumu.pdfIn PDF document text
    • http://edgewoodconferencecenter.com/uploads/1/3/0/6/130620838/totoruzo.pdfIn PDF document text
    • http://jdotech.net/uploads/1/3/0/6/130604973/xabavukunijifar.pdfIn PDF document text
    • http://thewreckingroom.net/uploads/1/3/0/5/130547038/7172186.pdfIn PDF document text
    • http://alltvnetwork.org/uploads/1/3/1/4/131406288/bozorudademaga.pdfIn PDF document text
    • http://mukboko.com/uploads/1/3/0/3/130313044/bonanamuv.pdfIn PDF document text
    • http://stevengethard.com/uploads/1/3/0/6/130620613/6566663.pdfIn PDF document text
    • http://aletaslater.com/uploads/1/3/0/5/130588718/5993d68e3.pdfIn PDF document text
    • http://appetitt.org/uploads/1/3/1/3/131380531/7fefec5.pdfIn PDF document text
    • http://katnsag.us/uploads/1/3/1/3/131383588/eb3ca.pdfIn PDF document text
    • http://inspectpa.net/uploads/1/3/0/8/130874668/d187cb49e2d5548.pdfIn PDF document text
    • http://elitedesignshoppe.com/uploads/1/3/0/5/130588206/nivejux.pdfIn PDF document text
    • http://jfleischer.com/uploads/1/3/0/2/130274355/sowuzeju.pdfIn PDF document text
    • http://h2oweddings.com/uploads/1/3/0/7/130739220/gitekoviwojum.pdfIn PDF document text
    • http://easytrack.nz/uploads/1/3/1/6/131637034/binukakunivavukoxak.pdfIn PDF document text
    • http://prepandprimehairstudio.com/uploads/1/3/0/2/130270934/kirabomomoxeziv.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

Related samples 7

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_off00005be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE7 9772 bytes
SHA-256: 56e208872beab327fa887f72c2b2dbfdfb60d2dbcba1fcb73341bd1d228940d2

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