Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a7c677cf164245…

MALICIOUS

PDF

39.3 KB Created: 2020-06-09 10:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: aa2c5b39422cde047011541dba83259c SHA-1: b43141d083330c82e30038d300349ddb81c52ce8 SHA-256: 93a7c677cf1642452bbd418c16fcc238ce013ba32655f4fd62e4d42547f93df6
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm. The document body, though heavily obfuscated, contains references to URLs that are likely intended to trick users into visiting malicious sites. The ML classifier strongly indicated maliciousness, supporting the presence of a link farm designed for SEO manipulation or phishing.

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://discoverychurchhickory.net/uploads/1/3/0/5/130542859/130542859.html#autodesk+sketchbook+tutorial+espa%25C3%25B1ol PDF link annotation
    • http://thenextbreastthing.net/uploads/1/3/0/8/130814584/6167279.pdfIn PDF document text
    • http://thecatchateau.com/uploads/1/3/0/8/130813975/fidab.pdfIn PDF document text
    • http://ekklesiainsights.com/uploads/1/3/0/7/130775280/a23f4b5d9b3.pdfIn PDF document text
    • http://tractorsale.net/uploads/1/3/0/4/130476821/zusupokinuzugobir.pdfIn PDF document text
    • http://explorebatangas.com/uploads/1/3/0/4/130435929/3d486ca410a.pdfIn PDF document text
    • http://decibel-doo.com/uploads/1/3/0/2/130288399/xumefomeza.pdfIn PDF document text
    • http://myrighttrack.org/uploads/1/3/1/3/131398052/40e474022.pdfIn PDF document text
    • http://forubydesign.com/uploads/1/3/1/4/131483440/binovijaxamumej-rejol-nafamekexuvid-vunalisilu.pdfIn PDF document text
    • http://stfrancisofassisi.info/uploads/1/3/0/8/130813054/karutifepasu.pdfIn PDF document text
    • http://mercierlawllc.com/uploads/1/3/1/4/131407797/e84aeb35c80d3.pdfIn PDF document text
    • http://hardwiredforempathy.com/uploads/1/3/0/6/130605071/powuruxotu.pdfIn PDF document text
    • http://parents.sprigeo.com/uploads/1/3/1/3/131379824/9763717.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://migosefej.files.wordpress.com/2020/06/nefiledirasubonovirigewo.pdfIn PDF document text
    • https://basirobogegi.files.wordpress.com/2020/06/36567370197.pdfIn PDF document text
    • https://siruzewi.files.wordpress.com/2020/06/59801142953.pdfIn PDF document text
    • https://buxanoxunos.files.wordpress.com/2020/06/33566116517.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 8

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_off000068a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A8 12428 bytes
SHA-256: 3506c6d2a078286899bf11fd2fcbcc279fb9d1814e0355fc7cd219edf1c9914d

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