Malicious PDF — malware analysis report

Static analysis result for SHA-256 51f26f3e1dfbde49…

MALICIOUS

PDF

49.1 KB Created: 2020-03-07 15:44:06 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 414a130b8579de6774f84345c4880c59 SHA-1: 2c35f8b34bd49e7cb373334b8088a952da3d5cf0 SHA-256: 51f26f3e1dfbde495f4b78dcd04e8b55fd17cb835f5c96ef8845713d87091c80
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 point to similarly structured URLs on different domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to drive traffic to malicious sites or for phishing purposes. The primary URL identified is http://74-123-75-26.mgwnet.com/uploads/1/3/0/5/130540405/130540405.html#weather+writing+activities+for+kindergarten, which is presented as educational content.

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://74-123-75-26.mgwnet.com/uploads/1/3/0/5/130540405/130540405.html#weather+writing+activities+for+kindergarten PDF link annotation
    • http://www.centraltexasplanner.com/uploads/1/3/0/9/130969989/3791466.pdfIn PDF document text
    • http://vocalclone.io/uploads/1/3/0/8/130873715/2472559.pdfIn PDF document text
    • http://einsteinsedibles.com/uploads/1/3/0/5/130590474/3048658.pdfIn PDF document text
    • http://phoenixmobilewelding.com/uploads/1/3/0/8/130814508/4887336.pdfIn PDF document text
    • http://acadiacannabis.com/uploads/1/3/0/4/130435629/2509127.pdfIn PDF document text
    • http://www.applesandbooks.com/uploads/1/3/0/3/130313803/xuvox.pdfIn PDF document text
    • http://www.banklon.com/uploads/1/3/0/5/130546391/c2a20.pdfIn PDF document text
    • http://mymmtx.com/uploads/1/3/0/6/130621439/migaditinipu.pdfIn PDF document text
    • http://moment2meditate.org/uploads/1/3/0/5/130588149/6154857.pdfIn PDF document text
    • http://thegreenbunnystore.com/uploads/1/3/0/4/130489830/b3c90.pdfIn PDF document text
    • http://www.coaststompers.com/uploads/1/3/0/6/130604072/tidupog_vebib_sesiv_fosabugif.pdfIn PDF document text
    • http://www.meetcodywilson.com/uploads/1/3/0/4/130436390/8521748.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

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_off00008d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D47 8448 bytes
SHA-256: bfd238e56aa84b6957d487346fafb8c79308bc1a482fa409d0f249154e64eb64
font_01_sfnt_off0000adc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC7 2616 bytes
SHA-256: d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04

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