Malicious PDF — malware analysis report

Static analysis result for SHA-256 55afe441b7dcc8b6…

MALICIOUS

PDF

39.1 KB Created: 2020-04-03 13:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 7503eb07fa12199bf9f1e172a21827a9 SHA-1: 10d150dc58b31fc78c4323283e8443cb8b08acf4 SHA-256: 55afe441b7dcc8b652260a5471f43dce4b44d844e2a2efaea692ecdd1f0b93be
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body contains text related to 'Exactitud y precision definicion y ejemplos' and mentions wkhtmltopdf, indicating it was likely generated programmatically. The primary goal appears to be directing users to a multitude of external PDF resources.

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://somertonconcertband.com/uploads/1/3/0/8/130814601/130814601.html#exactitud+y+precision+definicion+y+ejemplos PDF link annotation
    • http://couragethroughcancer.com/uploads/1/3/0/6/130604740/86650.pdfIn PDF document text
    • http://nsumc.net/uploads/1/3/0/4/130483345/8639693.pdfIn PDF document text
    • http://workshopforwriterspress.com/uploads/1/3/0/6/130604056/vagizuboz_banuruvovejova_dalaji.pdfIn PDF document text
    • http://villageoaksofroundrock.com/uploads/1/3/1/3/131381839/1b3af802.pdfIn PDF document text
    • http://cookiecuttersupply.com/uploads/1/3/1/1/131164507/buxojamare.pdfIn PDF document text
    • http://hunnelllaw.com/uploads/1/3/1/0/131070151/6618819.pdfIn PDF document text
    • http://garrickinternational.com/uploads/1/3/0/5/130544446/dc5eda0a2c48.pdfIn PDF document text
    • http://newyorkrealestate.solutions/uploads/1/3/1/3/131382693/641088.pdfIn PDF document text
    • http://carolina-premier.org/uploads/1/3/0/9/130970009/tabojikonarufo-mapenogavufufa-dopijurixezasil-gasedubozunono.pdfIn PDF document text
    • http://cinematicmasters.com/uploads/1/3/0/5/130590535/5725213.pdfIn PDF document text
    • http://scottscommercialservices.com/uploads/1/3/0/5/130588543/659b68f79a52.pdfIn PDF document text
    • http://cherlynskincare.com/uploads/1/3/0/9/130968935/vomosuzur.pdfIn PDF document text
    • http://mrweaver.us/uploads/1/3/0/5/130543667/5445851.pdfIn PDF document text
    • http://brendamurdock.com/uploads/1/3/0/6/130639622/0c9da16f0.pdfIn PDF document text
    • http://dailybull.com/uploads/1/3/0/5/130539612/193cf7ff981126.pdfIn PDF document text
    • http://dtmgt.com/uploads/1/3/0/6/130605399/40110b87790.pdfIn PDF document text
    • http://frutillar.org/uploads/1/3/1/3/131382531/7228899.pdfIn PDF document text
    • http://salishseamedicine.com/uploads/1/3/1/4/131437538/zisivobafide.pdfIn PDF document text
    • http://boardroomblitz.org/uploads/1/3/0/8/130815013/1ff17837.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

Related samples 1

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_off00006dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFC 8568 bytes
SHA-256: 235a859be914b5549c03b3280dc55fe6474a07e8ff4ebb1a421645b20cff61fa

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