Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f21e3dcb6d3b96…

MALICIOUS

PDF

49.5 KB Created: 2020-04-16 17:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 62c230ac7185d9762d3e1d348582afa6 SHA-1: 73370ec9bdd839519a0e99519fe84a2e69d01113 SHA-256: a2f21e3dcb6d3b96fa3f9528924d0ce9b3061c05d868ab3b2e1b87ff9696d279
136 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a potential attempt to drive traffic to a network of related sites. The embedded URL 'http://vibesoundrelaxation.com/uploads/1/3/0/5/130588515/130588515.html#google+administrador+de+dispositivos+android' and the numerous other PDF links suggest a coordinated effort to leverage these domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://vibesoundrelaxation.com/uploads/1/3/0/5/130588515/130588515.html#google+administrador+de+dispositivos+android PDF link annotation
    • http://falmar.net/uploads/1/3/0/2/130289242/kozemeponilizikogama.pdfIn PDF document text
    • http://gaiasana.com/uploads/1/3/1/4/131453745/3299309.pdfIn PDF document text
    • http://virtualproductshots.com/uploads/1/3/0/4/130483394/3242842.pdfIn PDF document text
    • http://anacostiagrows.org/uploads/1/3/1/6/131606197/wobetukik_xireto.pdfIn PDF document text
    • http://lifeinsurancebros.com/uploads/1/3/1/3/131379478/fosiwadizodig-jerizirefuk.pdfIn PDF document text
    • http://yjcapitalusa.com/uploads/1/3/0/7/130776672/9694912.pdfIn PDF document text
    • http://osmosistours.com/uploads/1/3/0/7/130776405/fuluxagukajazasi.pdfIn PDF document text
    • http://bigschoolbag.com/uploads/1/3/0/7/130739530/22aa8f1a.pdfIn PDF document text
    • http://tamaracklaw.ca/uploads/1/3/0/5/130551055/6670219.pdfIn PDF document text
    • http://rihgreetings.com/uploads/1/3/0/6/130621267/ecbf85a6.pdfIn PDF document text
    • http://runningstraightintoyou.com/uploads/1/3/1/4/131406321/6039c1994.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF4 6816 bytes
SHA-256: 70140192f1f4f40c70a57880bd93b6afdf4e9db80e05eb3e95414adf49b42d10
font_01_sfnt_off00008001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8001 9084 bytes
SHA-256: 5a6f08ac29413389aebe107ebac8f73016a88562c00b6c80c220dde140bb1378
font_02_sfnt_off0000a0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0FE 16316 bytes
SHA-256: d2be4324ea85f46c9bb4ffd26358c7cfd1611c1246fc57774eae11ca9f8f8764

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