Malicious PDF — malware analysis report

Static analysis result for SHA-256 8822a5ce755cb63b…

MALICIOUS

PDF

50.8 KB Created: 2020-06-05 20:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 28d9355be007181a0f44ef7db9dab2a6 SHA-1: 39840d6567565a7ec8d534fb19ebf21f5b75159d SHA-256: 8822a5ce755cb63bdd9c11339579c220dabcec49b9fbcc040bd24f1b22d8e578
136 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of a 'Password-protected archive handoff' heuristic indicates that the document is likely intended to trick the user into downloading an encrypted payload, which would then require a password provided by the document to open.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://seriouslysassy.net/uploads/1/3/1/0/131070711/131070711.html#mastering+the+art+of+getting+things+done PDF link annotation
    • http://bolofide.com/uploads/1/3/1/8/131856771/048c1.pdfIn PDF document text
    • http://tributegraphics.com/uploads/1/3/1/8/131857090/cc710c0f1a.pdfIn PDF document text
    • http://fr.melissa-melendez.com/uploads/1/3/1/8/131860938/1487719.pdfIn PDF document text
    • http://magnoliainteriors.org/uploads/1/3/0/3/130323249/f5b9c0cd.pdfIn PDF document text
    • http://treesforourfuture.com/uploads/1/3/0/7/130739489/taruzajaraxodi.pdfIn PDF document text
    • http://howtheheckwouldiknowthat.com/uploads/1/3/1/4/131411281/6588624.pdfIn PDF document text
    • http://ylc3.gobeyondthepond.com/uploads/1/3/0/5/130544387/6983fce3d.pdfIn PDF document text
    • http://soultivity.net/uploads/1/3/2/3/132302960/nitiberuguzomoduko.pdfIn PDF document text
    • http://seriouslysassy.net/uploads/1/3/1/0/131070711/terms.htmlIn PDF document text
    • http://seriouslysassy.net/uploads/1/3/1/0/131070711/dmca.htmlIn PDF document text
    • http://seriouslysassy.net/uploads/1/3/1/0/131070711/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://revaxakel.files.wordpress.com/2020/06/73275841762.pdfIn PDF document text
    • https://wimaped597797669.files.wordpress.com/2020/06/67404643122.pdfIn PDF document text
    • https://fugokogan.files.wordpress.com/2020/06/20693149725.pdfIn PDF document text
    • https://miserowage857454741.files.wordpress.com/2020/06/63095964108.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
🗂 Part of campaign: soultivity.net 3 samples

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_off00009b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B36 10576 bytes
SHA-256: 47834e0a6b87495b5d15985a0c2e6987913c46b9457b3093a1f1e94e34a4cada

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